{ "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-2026-123828", "tracking": { "current_release_date": "2026-11-13T20:32:38.442638Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-123828", "initial_release_date": "2026-11-11T18:38:58.831896Z", "revision_history": [ { "date": "2026-11-11T18:38:58.831896Z", "number": "1", "summary": "CWES created (1).| Products created (2).| References created (2).| Description created for source.| Unknown change." }, { "date": "2026-11-11T18:39:07.483541Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-11-11T19:31:55.874828Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-11-11T19:31:57.729419Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-11-12T00:34:16.726049Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (6).| Product Identifiers created (1).| Product Remediations created (6).| References created (4).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-11-12T00:34:18.171541Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-11-12T02:41:47.959828Z", "number": "7", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-11-12T06:44:37.228825Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1)." }, { "date": "2026-11-12T06:44:38.317877Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-11-12T12:02:32.635248Z", "number": "10", "summary": "CVSS created.| Products created (4).| References created (1).| Description created for source.| Unknown change." }, { "date": "2026-11-12T12:02:40.911314Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-11-12T12:19:46.735678Z", "number": "12", "summary": "Source connected.| CVE status created. (valid)| Products connected (3).| References created (3)." }, { "date": "2026-11-12T12:19:49.501397Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-11-12T14:20:18.743201Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-11-12T16:16:58.762602Z", "number": "15", "summary": "EPSS created.| Unknown change." }, { "date": "2026-11-12T16:19:38.634547Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-11-13T00:02:55.805827Z", "number": "17", "summary": "Products created (1)." }, { "date": "2026-11-13T14:32:25.591781Z", "number": "18", "summary": "NCSC Score updated." } ], "status": "interim", "version": "18" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<22.23.5", "product": { "name": "vers:unknown/<22.23.5", "product_id": "CSAFPID-10088842" } }, { "category": "product_version_range", "name": "vers:unknown/<24.22.3", "product": { "name": "vers:unknown/<24.22.3", "product_id": "CSAFPID-10088840" } }, { "category": "product_version_range", "name": "vers:unknown/<26.13.1", "product": { "name": "vers:unknown/<26.13.1", "product_id": "CSAFPID-10088841" } } ], "category": "product_name", "name": "Node.js" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/1", "product": { "name": "vers:rpm/1", "product_id": "CSAFPID-6014972", "product_identification_helper": { "cpe": "cpe:/a:redhat:hummingbird:1" } } } ], "category": "product_name", "name": "Red Hat Hardened Images" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8505503" } } ], "category": "product_name", "name": "nodejs20" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8505504" } } ], "category": "product_name", "name": "nodejs22" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8476917" } } ], "category": "product_name", "name": "nodejs24" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-6239276" } } ], "category": "product_name", "name": "nodejs25" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8476920" } } ], "category": "product_name", "name": "nodejs26" } ], "category": "product_family", "name": "Red Hat Hardened Images" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<22.23.5-r0", "product": { "name": "vers:unknown/>=0|<22.23.5-r0", "product_id": "CSAFPID-10088332" } } ], "category": "product_name", "name": "nodejs" } ], "category": "product_family", "name": "Alpine:v3.21" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<22.23.5-r0", "product": { "name": "vers:unknown/>=0|<22.23.5-r0", "product_id": "CSAFPID-10088333" } } ], "category": "product_name", "name": "nodejs" } ], "category": "product_family", "name": "Alpine:v3.22" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<24.22.3-r0", "product": { "name": "vers:unknown/>=0|<24.22.3-r0", "product_id": "CSAFPID-10088334" } } ], "category": "product_name", "name": "nodejs" } ], "category": "product_family", "name": "Alpine:v3.23" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<24.22.3-r0", "product": { "name": "vers:unknown/>=0|<24.22.3-r0", "product_id": "CSAFPID-10088335" } } ], "category": "product_name", "name": "nodejs" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<26.13.1-r0", "product": { "name": "vers:unknown/>=0|<26.13.1-r0", "product_id": "CSAFPID-10092238" } } ], "category": "product_name", "name": "nodejs-current" } ], "category": "product_family", "name": "Alpine:v3.24" } ], "category": "vendor", "name": "Alpine" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-1408881" } } ], "category": "product_name", "name": "nodejs" } ], "category": "product_family", "name": "bookworm" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/24.0.0|<24.22.3", "product": { "name": "vers:semver/24.0.0|<24.22.3", "product_id": "CSAFPID-10084444" } }, { "category": "product_version_range", "name": "vers:semver/25.0.0|<26.13.1", "product": { "name": "vers:semver/25.0.0|<26.13.1", "product_id": "CSAFPID-10084445" } } ], "category": "product_name", "name": "nodejs" } ], "category": "vendor", "name": "nodejs" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-123828", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "notes": [ { "category": "description", "text": "A one-byte heap buffer overflow in Node.js HTTP/2 Alt-Svc handling lets a remote, unauthenticated attacker corrupt process memory. When an application passes an attacker-controlled value such as a request's :authority header to Http2Session.altsvc(), the AltSvc implementation in src/node_http2.cc allocates a buffer sized to the origin length and then writes it with a null terminator, placing one byte past the end of the allocation. A single request carrying a long but syntactically valid :authority triggers the out-of-bounds write, which aborts the process and serves as a remote heap-corruption primitive. This vulnerability affects Node.js 26.x and 24.x.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-123828" }, { "category": "description", "text": "A one-byte heap buffer overflow in Node.js HTTP/2 Alt-Svc handling lets a remote, unauthenticated attacker corrupt process memory. When an application passes an attacker-controlled value such as a request's :authority header to Http2Session.altsvc(), the AltSvc implementation in src/node_http2.cc allocates a buffer sized to the origin length and then writes it with a null terminator, placing one byte past the end of the allocation. A single request carrying a long but syntactically valid :authority triggers the out-of-bounds write, which aborts the process and serves as a remote heap-corruption primitive. This vulnerability affects Node.js 26.x and 24.x.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-123828" }, { "category": "description", "text": "A one-byte heap buffer overflow in Node.js HTTP/2 Alt-Svc handling lets a remote, unauthenticated attacker corrupt process memory. When an application passes an attacker-controlled value such as a request's :authority header to Http2Session.altsvc(), the AltSvc implementation in src/node_http2.cc allocates a buffer sized to the origin length and then writes it with a null terminator, placing one byte past the end of the allocation. A single request carrying a long but syntactically valid :authority triggers the out-of-bounds write, which aborts the process and serves as a remote heap-corruption primitive. This vulnerability affects Node.js 26.x and 24.x.", "title": "osvalpine - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Alpine%2FALPINE-CVE-2026-123828.json?alt=media" }, { "category": "description", "text": "A flaw was found in Node.js. A remote, unauthenticated attacker can cause a Denial of Service (DoS) by sending a specially crafted request with an oversized header to an application that processes HTTP/2 Alternative Services (Alt-Svc). Due to an off-by-one heap buffer overflow, the application writes one byte past the allocated memory buffer, corrupting process memory and causing the server to crash.\nRed Hat has evaluated this vulnerability as Moderate severity because exploitation requires specific application-level code to process untrusted input through the HTTP/2 Alternative Services API, limiting broad exposure despite potential process crashes. Standard deployments do not automatically pass client-controlled headers to this interface. The flaw primarily presents an availability risk through application termination rather than arbitrary code execution under standard runtime protections.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-123828" }, { "category": "description", "text": "A one-byte heap buffer overflow in Node.js HTTP/2 Alt-Svc handling lets a remote, unauthenticated attacker corrupt process memory. When an application passes an attacker-controlled value such as a request's :authority header to Http2Session.altsvc(), the AltSvc implementation in src/node_http2.cc allocates a buffer sized to the origin length and then writes it with a null terminator, placing one byte past the end of the allocation. A single request carrying a long but syntactically valid :authority triggers the out-of-bounds write, which aborts the process and serves as a remote heap-corruption primitive. This vulnerability affects Node.js 26.x and 24.x.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-123828" }, { "category": "other", "text": "0.00547", "title": "EPSS" }, { "category": "other", "text": "3.8", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to a product by vendor Debian, Is related to a product by vendor Open Source, Is related to an uncommon product vendor", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-10084444", "CSAFPID-10084445", "CSAFPID-6014972", "CSAFPID-6239276", "CSAFPID-8476917", "CSAFPID-8476920", "CSAFPID-8505503", "CSAFPID-8505504", "CSAFPID-1408881", "CSAFPID-10088332", "CSAFPID-10088333", "CSAFPID-10088334", "CSAFPID-10088335", "CSAFPID-10088840", "CSAFPID-10088841", "CSAFPID-10088842", "CSAFPID-10092238" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-123828" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123828" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-123828" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-123828" }, { "category": "external", "summary": "Source - hkcert", "url": "https://www.hkcert.org/security-bulletin/node-js-multiple-vulnerabilities_20261112" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-123828" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Alpine%2FALPINE-CVE-2026-123828.json?alt=media" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-4525.json" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0492" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-4525.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-4525" }, { "category": "external", "summary": "Reference - certbundde; cveprojectv5; nvd; redhat", "url": "https://nodejs.org/en/blog/vulnerability/november-2026-security-releases" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://cna.openjsf.org/security-advisories.html" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-123828" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123828" }, { "category": "external", "summary": "Reference - osv", "url": "https://security.alpinelinux.org/vuln/CVE-2026-123828" } ], "remediations": [ { "category": "mitigation", "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.", "product_ids": [ "CSAFPID-6014972", "CSAFPID-6239276", "CSAFPID-8476917", "CSAFPID-8476920", "CSAFPID-8505503", "CSAFPID-8505504" ] } ], "scores": [ { "cvss_v3": { "version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-10084444", "CSAFPID-10084445", "CSAFPID-10088332", "CSAFPID-10088333", "CSAFPID-10088334", "CSAFPID-10088335", "CSAFPID-10088840", "CSAFPID-10088841", "CSAFPID-10088842", "CSAFPID-10092238", "CSAFPID-1408881", "CSAFPID-6014972", "CSAFPID-6239276", "CSAFPID-8476917", "CSAFPID-8476920", "CSAFPID-8505503", "CSAFPID-8505504" ] } ], "title": "CVE-2026-123828" } ] }