{ "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-2026-3635", "tracking": { "current_release_date": "2026-03-26T00:22:11.006448Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-3635", "initial_release_date": "2026-03-23T17:30:43.553498Z", "revision_history": [ { "date": "2026-03-23T17:30:43.553498Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-23T17:30:50.158599Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-23T18:12:41.661842Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (3).| CWES updated (1)." }, { "date": "2026-03-23T18:12:43.628140Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-23T22:27:46.963949Z", "number": "5", "summary": "Unknown change." }, { "date": "2026-03-24T20:42:27.151212Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (11).| Product Identifiers created (3).| Product Remediations created (12).| Products created (1).| References created (4).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-24T20:42:37.018577Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-03-24T21:36:36.264970Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-25T20:11:28.412922Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (6).| CWES updated (1)." }, { "date": "2026-03-25T20:11:38.334388Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-26T00:21:31.909886Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (5).| CWES updated (1)." } ], "status": "interim", "version": "11" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/5.8.3", "product": { "name": "vers:semver/5.8.3", "product_id": "CSAFPID-5893896" } }, { "category": "product_version_range", "name": "vers:semver/<=5.8.2", "product": { "name": "vers:semver/<=5.8.2", "product_id": "CSAFPID-5893895" } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<5.8.3", "product": { "name": "vers:unknown/>=0|<5.8.3", "product_id": "CSAFPID-5912524" } } ], "category": "product_name", "name": "Fastify" } ], "category": "vendor", "name": "Fastify" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/3", "product": { "name": "vers:rpm/3", "product_id": "CSAFPID-5198605", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux_ai:3" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux AI (RHEL AI) 3" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1439279", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift_ai" } } } ], "category": "product_name", "name": "Red Hat OpenShift AI (RHOAI)" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/3", "product": { "name": "vers:rpm/3", "product_id": "CSAFPID-1441150", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift_devspaces:3:" } } } ], "category": "product_name", "name": "Red Hat OpenShift Dev Spaces" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5205180" } } ], "category": "product_name", "name": "bootc-cuda-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5811351" } } ], "category": "product_name", "name": "bootc-rocm-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5205182" } } ], "category": "product_name", "name": "disk-image-cuda-rhel9" } ], "category": "product_family", "name": "Red Hat Enterprise Linux AI (RHEL AI) 3" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2467451" } } ], "category": "product_name", "name": "dashboard-rhel9" } ], "category": "product_family", "name": "Red Hat OpenShift Dev Spaces" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1851478" } } ], "category": "product_name", "name": "odh-dashboard-rhel8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2933419" } } ], "category": "product_name", "name": "odh-dashboard-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5222758" } } ], "category": "product_name", "name": "odh-mod-arch-gen-ai-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5901550" } } ], "category": "product_name", "name": "odh-mod-arch-maas-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5157328" } } ], "category": "product_name", "name": "odh-mod-arch-model-registry-rhel9" } ], "category": "product_family", "name": "Red Hat OpenShift AI (RHOAI)" } ], "category": "vendor", "name": "Red Hat" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-3635", "cwe": { "id": "CWE-348", "name": "Use of Less Trusted Source" }, "notes": [ { "category": "description", "text": "Summary\nWhen trustProxy is configured with a restrictive trust function (e.g., a specific IP like trustProxy: '10.0.0.1', a subnet, a hop count, or a custom function), the request.protocol and request.host getters read X-Forwarded-Proto and X-Forwarded-Host headers from any connection — including connections from untrusted IPs. This allows an attacker connecting directly to Fastify (bypassing the proxy) to spoof both the protocol and host seen by the application.\n\nAffected Versions\nfastify <= 5.8.2\n\nImpact\nApplications using request.protocol or request.host for security decisions (HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction, host-based routing) are affected when trustProxy is configured with a restrictive trust function.\n\nWhen trustProxy: true (trust everything), both host and protocol trust all forwarded headers — this is expected behavior. The vulnerability only manifests with restrictive trust configurations.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-3635" }, { "category": "description", "text": "Summary\nWhen trustProxy is configured with a restrictive trust function (e.g., a specific IP like trustProxy: '10.0.0.1', a subnet, a hop count, or a custom function), the request.protocol and request.host getters read X-Forwarded-Proto and X-Forwarded-Host headers from any connection — including connections from untrusted IPs. This allows an attacker connecting directly to Fastify (bypassing the proxy) to spoof both the protocol and host seen by the application.\n\nAffected Versions\nfastify <= 5.8.2\n\nImpact\nApplications using request.protocol or request.host for security decisions (HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction, host-based routing) are affected when trustProxy is configured with a restrictive trust function.\n\nWhen trustProxy: true (trust everything), both host and protocol trust all forwarded headers — this is expected behavior. The vulnerability only manifests with restrictive trust configurations.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/3xxx/CVE-2026-3635.json" }, { "category": "description", "text": "A flaw was found in fastify. When the trustProxy option is configured with a restrictive trust function, such as a specific IP, a subnet, a hop count or a custom function, the request.protocol and request.host getters read X-Forwarded-Proto and X-Forwarded-Host headers from any connection, including connections from untrusted IPs. This allows an attacker connecting directly to the server, bypassing the proxy, to spoof both the protocol and host seen by the application.\nThis vulnerability is only exploitable by applications using the trustProxy option with a restrictive trust function and only when the request.protocol or request.host getters are used for security decisions, such as HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction or host-based routing. Also, to exploit this issue, an attacker needs to bypass the proxy entirely and connect directly to the Fastify application port, limiting the exposure of this flaw. Due to these reasons, this vulnerability has been rated with a moderate severity.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-3635.json" }, { "category": "description", "text": "## Summary\n\nWhen `trustProxy` is configured with a restrictive trust function (e.g., a specific IP like `trustProxy: '10.0.0.1'`, a subnet, a hop count, or a custom function), the `request.protocol` and `request.host` getters read `X-Forwarded-Proto` and `X-Forwarded-Host` headers from any connection — including connections from untrusted IPs. This allows an attacker connecting directly to Fastify (bypassing the proxy) to spoof both the protocol and host seen by the application.\n\n## Affected Versions\n\nfastify <= 5.8.2\n\n## Impact\n\nApplications using `request.protocol` or `request.host` for security decisions (HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction, host-based routing) are affected when `trustProxy` is configured with a restrictive trust function.\n\nWhen `trustProxy: true` (trust everything), both `host` and `protocol` trust all forwarded headers — this is expected behavior. The vulnerability only manifests with restrictive trust configurations.", "title": "github - https://api.github.com/advisories/GHSA-444r-cwp2-x5xf" }, { "category": "description", "text": "## Summary\n\nWhen `trustProxy` is configured with a restrictive trust function (e.g., a specific IP like `trustProxy: '10.0.0.1'`, a subnet, a hop count, or a custom function), the `request.protocol` and `request.host` getters read `X-Forwarded-Proto` and `X-Forwarded-Host` headers from any connection — including connections from untrusted IPs. This allows an attacker connecting directly to Fastify (bypassing the proxy) to spoof both the protocol and host seen by the application.\n\n## Affected Versions\n\nfastify <= 5.8.2\n\n## Impact\n\nApplications using `request.protocol` or `request.host` for security decisions (HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction, host-based routing) are affected when `trustProxy` is configured with a restrictive trust function.\n\nWhen `trustProxy: true` (trust everything), both `host` and `protocol` trust all forwarded headers — this is expected behavior. The vulnerability only manifests with restrictive trust configurations.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-444r-cwp2-x5xf.json?alt=media" }, { "category": "other", "text": "6e-05", "title": "EPSS" }, { "category": "other", "text": "4.2", "title": "NCSC Score" }, { "category": "other", "text": "Is related to (a version of) an uncommon product, There is cwe data available from source Nvd, There is product_remediation data available from source Redhat", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5893895", "CSAFPID-1439279", "CSAFPID-1441150", "CSAFPID-1851478", "CSAFPID-2467451", "CSAFPID-2933419", "CSAFPID-5157328", "CSAFPID-5198605", "CSAFPID-5205180", "CSAFPID-5205182", "CSAFPID-5222758", "CSAFPID-5811351", "CSAFPID-5901550", "CSAFPID-5912524" ], "known_not_affected": [ "CSAFPID-5893896" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-3635" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/3xxx/CVE-2026-3635.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-3635.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-444r-cwp2-x5xf" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-444r-cwp2-x5xf.json?alt=media" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://cna.openjsf.org/security-advisories.html" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/fastify/fastify/security/advisories/GHSA-444r-cwp2-x5xf" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-3635" }, { "category": "external", "summary": "Reference - github; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3635" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://github.com/fastify/fastify/releases/tag/v5.8.3" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-444r-cwp2-x5xf" } ], "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-1439279", "CSAFPID-1441150", "CSAFPID-1851478", "CSAFPID-2467451", "CSAFPID-2933419", "CSAFPID-5157328", "CSAFPID-5198605", "CSAFPID-5205180", "CSAFPID-5205182", "CSAFPID-5222758", "CSAFPID-5811351", "CSAFPID-5901550" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1439279", "CSAFPID-1441150", "CSAFPID-1851478", "CSAFPID-2467451", "CSAFPID-2933419", "CSAFPID-5157328", "CSAFPID-5198605", "CSAFPID-5205180", "CSAFPID-5205182", "CSAFPID-5222758", "CSAFPID-5811351", "CSAFPID-5893895", "CSAFPID-5901550", "CSAFPID-5912524" ] } ], "title": "CVE-2026-3635" } ] }