{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-28478", "tracking": { "current_release_date": "2026-03-23T03:18:47.014436Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-28478", "initial_release_date": "2026-03-05T22:29:04.047451Z", "revision_history": [ { "date": "2026-03-05T22:29:04.047451Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-05T22:29:05.702056Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-05T22:38:49.778685Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-05T22:38:56.405125Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-06T00:20:59.879758Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| References created (1).| CWES updated (1)." }, { "date": "2026-03-06T00:21:04.174855Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-06T07:35:16.234125Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-03-06T08:05:50.534148Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (69)." }, { "date": "2026-03-06T08:05:52.519778Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-03-06T14:53:01.270940Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-06T14:53:03.884083Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-09T18:39:19.695605Z", "number": "12", "summary": "Unknown change." }, { "date": "2026-03-09T18:39:22.572704Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-03-17T18:25:03.068024Z", "number": "14", "summary": "Products connected (1).| Product Identifiers created (1)." }, { "date": "2026-03-17T18:25:04.947908Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-20T09:36:59.788311Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:37:04.522231Z", "number": "17", "summary": "NCSC Score updated." } ], "status": "interim", "version": "17" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2026.2.14", "product": { "name": "vers:unknown/<2026.2.14", "product_id": "CSAFPID-5628215" } } ], "category": "product_name", "name": "OpenClaw" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2026.2.13", "product": { "name": "vers:unknown/<2026.2.13", "product_id": "CSAFPID-5763941" } } ], "category": "product_name", "name": "OpenClaw" } ], "category": "vendor", "name": "OpenClaw" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<=2026.1.24-3", "product": { "name": "vers:unknown/>=0|<=2026.1.24-3", "product_id": "CSAFPID-5628212" } } ], "category": "product_name", "name": "clawdbot" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2026.2.13", "product": { "name": "vers:unknown/<2026.2.13", "product_id": "CSAFPID-5642474", "product_identification_helper": { "cpe": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<2026.2.13", "product": { "name": "vers:unknown/>=0|<2026.2.13", "product_id": "CSAFPID-5626749" } } ], "category": "product_name", "name": "openclaw" } ], "category": "vendor", "name": "openclaw" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-28478", "cwe": { "id": "CWE-770", "name": "Allocation of Resources Without Limits or Throttling" }, "notes": [ { "category": "description", "text": "OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-28478" }, { "category": "description", "text": "OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-28478" }, { "category": "description", "text": "### Summary\nMultiple webhook handlers accepted and buffered request bodies without a strict unified byte/time limit. A remote unauthenticated attacker could send oversized payloads and cause memory pressure, degrading availability.\n\n### Details\nAffected packages:\n- `openclaw` (npm): `<2026.2.12`\n- `clawdbot` (npm): `<=2026.1.24-3`\n\nRoot cause:\n- Webhook code paths buffered request payloads without consistent `maxBytes` + `timeoutMs` enforcement.\n- Some SDK-backed handlers parse request bodies internally and needed stream-level guards.\n\nAttack shape:\n- Send very large JSON payloads or slow/incomplete uploads to webhook endpoints.\n- Observe elevated memory usage and request handler pressure.\n\n### Impact\nRemote unauthenticated availability impact (DoS) via request body amplification/memory pressure.\n\n### Patch details (implemented)\n- Added shared bounded request-body helper in `src/infra/http-body.ts`.\n- Exported helper in `src/plugin-sdk/index.ts` for extension reuse.\n- Migrated webhook body readers to shared helper for:\n - LINE\n - Nextcloud Talk\n - Google Chat\n - Zalo\n - BlueBubbles\n - Nostr profile HTTP\n - Voice-call\n - Gateway hooks\n- Added stream guards for SDK handlers that parse request bodies internally:\n - Slack\n - Telegram\n - Feishu\n- Added explicit Express JSON body limit handling for MS Teams webhook path.\n- Standardized failure responses:\n - `413 Payload Too Large`\n - `408 Request Timeout`\n\n### Tests\n- Added regression tests:\n - `src/infra/http-body.test.ts`\n - `src/line/monitor.read-body.test.ts`\n - `extensions/nextcloud-talk/src/monitor.read-body.test.ts`\n- Focused webhook/security test suite passes for patched paths.\n\n### Remediation\nUpgrade to the first release containing this patch.\n\n## Credits\nThanks @vincentkoc for reporting.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-q447-rj3r-2cgh.json?alt=media" }, { "category": "other", "text": "0.00125", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "title": "CVSSV4" }, { "category": "other", "text": "8.7", "title": "CVSSV4 base score" }, { "category": "other", "text": "6.1", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde, There is product data available from source Nvd", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "The value of the most recent EPSS score", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5763941", "CSAFPID-5626749", "CSAFPID-5628212", "CSAFPID-5628215", "CSAFPID-5642474" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28478" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-28478" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-28478" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28478.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-q447-rj3r-2cgh.json?alt=media" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0424.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-28478" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930" }, { "category": "external", "summary": "Reference - certbundde; cveprojectv5; nvd; osv", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-webhook-request-body-buffering" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0424.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0424" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-33rq-m5x2-fvgf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-3fqr-4cg8-h96q" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-3hcm-ggvf-rch5" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-3m3q-x3gj-f79x" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-4564-pvr2-qq4h" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-47q7-97xp-m272" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-4hg8-92x6-h2f3" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-4rj2-gpmh-qq5x" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-56f2-hvwg-5743" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-5xfq-5mr7-426q" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-64qx-vpxx-mvqf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-782p-5fr5-7fj8" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-7q2j-c4q5-rm27" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-7rcp-mxpq-72pj" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-7xhj-55q9-pc3m" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-8mh7-phf8-xgfm" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-943q-mwmv-hhvh" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-c37p-4qqg-3p76" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-chm2-m3w2-wcxm" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-cv7m-c9jx-vg7q" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjv" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-g27f-9qjv-22pm" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-g34w-4xqq-h79m" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-g6q9-8fvw-f7rf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-gq9c-wg68-gwj2" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-gv46-4xfq-jv58" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-h3f9-mjwj-w476" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-h89v-j3x9-8wqj" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-h9g4-589h-68xv" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-hv93-r4j3-q65f" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-j27p-hq53-9wgc" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-jfv4-h8mc-jcp8" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-jmm5-fvh5-gf4p" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-jqpq-mgvm-f9r6" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-jrvc-8ff5-2f9f" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-m7x8-2w3w-pr42" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-mj5r-hh7j-4gxf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-mp5h-m6qj-6292" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-mqpw-46fh-299h" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-mr32-vwc2-5j6h" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-mv9j-6xhh-g383" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-p25h-9q54-ffvw" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-pchc-86f6-8758" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-pg2v-8xwh-qhcc" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-pv58-549p-qh99" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qj77-c3c8-9c3q" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qpjj-47vm-64pj" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qrq5-wjgg-rvqw" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qw99-grcx-4pvm" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rmxw-jxxx-4cpc" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rq6g-px6m-c248" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rv39-79c4-7459" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rwj8-p9vq-25gv" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v6c6-vqqg-w888" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v773-r54f-q32w" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v892-hwpg-jwqp" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-w2cg-vxx6-5xjg" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-w5c7-9qqw-6645" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-wfp2-v9c7-fh79" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-x22m-j5qq-j49m" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-xc7w-v5x6-cc87" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-xvhf-x56f-2hpp" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-xw4p-pw82-hqr7" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-xwjm-j929-xq7c" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5626749", "CSAFPID-5628212", "CSAFPID-5628215", "CSAFPID-5642474", "CSAFPID-5763941" ] } ], "title": "CVE-2026-28478" } ] }