{"id":"EUVD-2026-37758","revision":"a76b8fe2f2cd4dbf9de5dc2b097f5e79","records":[{"revision":"a76b8fe2f2cd4dbf9de5dc2b097f5e79","observedAt":"2026-11-15T10:11:43.136+00:00","statement":{"source":"euvd","id":"EUVD-2026-37758","aliases":["CVE-2026-11525","GHSA-g8m3-5g58-fq7m"],"title":"Impact:","description":"Impact:\nWhen undici parses a Set-Cookie header, it accepts any SameSite attribute value that contains Strict, Lax, or None as a substring, rather than the case-insensitive exact match specified by RFC 6265. Non-spec values are silently mapped to one of the three standard tokens. For example, SameSite=NoneOfYourBusiness is parsed as None (the most permissive setting), and SameSite=StrictLax is parsed as Lax (a downgrade from Strict).\n\nAffected applications are those that consume Set-Cookie headers from server responses (for example via undici's fetch or proxy code paths) and then forward or rely on the parsed sameSite attribute. A malicious or non-compliant server can coerce the consumer's view of a cookie's SameSite policy to a weaker value, silently degrading the SameSite enforcement the cookie is supposed to provide.\n\nThis was introduced in undici 5.15.0 when the cookies feature was added.\n\nPatches:\nUpgrade to undici v6.26.0, v7.28.0 or v8.5.0.\n\nWorkarounds:\nAfter parsing a Set-Cookie header, validate that the resulting sameSite attribute is one of 'Strict', 'Lax', or 'None' (exact, case-insensitive) before forwarding or relying on it.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":null}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-g8m3-5g58-fq7m","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-37758","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 17, 2026, 5:31:03 PM","dateUpdated":"Jun 17, 2026, 5:54:22 PM"},"relatedAdvisories":[{"id":"SUSE-SU-2026:4248-1","title":"Security update for nodejs18","vulnerabilityIds":["CVE-2025-22150","CVE-2025-23166","CVE-2025-23167","CVE-2025-55131","CVE-2025-59465","CVE-2025-59466","CVE-2025-62408","CVE-2026-11525","CVE-2026-12151","CVE-2026-15157","CVE-2026-16728","CVE-2026-16729","CVE-2026-21637","CVE-2026-21710","CVE-2026-21713","CVE-2026-21714","CVE-2026-21717","CVE-2026-22036","CVE-2026-27135","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-56846","CVE-2026-56848","CVE-2026-56850","CVE-2026-58040","CVE-2026-58042","CVE-2026-58043","CVE-2026-58044","CVE-2026-58045","CVE-2026-6733","CVE-2026-9679"]},{"id":"WID-SEC-W-2026-2618","title":"IBM App Connect Enterprise: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-13676","CVE-2026-53550","CVE-2026-54285","CVE-2026-59869","CVE-2026-59877","CVE-2026-6733","CVE-2026-6734","CVE-2026-9675","CVE-2026-9678","CVE-2026-9679","CVE-2026-9697"]},{"id":"RHSA-2026:38236","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-5078","CVE-2026-6733","CVE-2026-6734","CVE-2026-9678","CVE-2026-9679","CVE-2026-9697","CVE-2026-11525","CVE-2026-12151","CVE-2026-53550","CVE-2026-59869"]},{"id":"RHSA-2026:39868","title":"Red Hat Security Advisory: nodejs:24 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-6734","CVE-2026-9678","CVE-2026-9697","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]},{"id":"openSUSE-SU-2026:21236-1","title":"Security update for nodejs24","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-2581","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9678","CVE-2026-9679"]},{"id":"RHSA-2026:35892","title":"Red Hat Security Advisory: nodejs:22 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-9678","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]},{"id":"RHSA-2026:35891","title":"Red Hat Security Advisory: nodejs:24 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-6734","CVE-2026-9678","CVE-2026-9697","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]},{"id":"openSUSE-SU-2026:21058-1","title":"Security update for nodejs22","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-21637","CVE-2026-21710","CVE-2026-21713","CVE-2026-21714","CVE-2026-21715","CVE-2026-21716","CVE-2026-21717","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9679"]},{"id":"RHSA-2026:41947","title":"Red Hat Security Advisory: nodejs:22 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-9678","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]},{"id":"SUSE-SU-2026:22368-1","title":"Security update for nodejs22","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-21637","CVE-2026-21710","CVE-2026-21713","CVE-2026-21714","CVE-2026-21715","CVE-2026-21716","CVE-2026-21717","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9679"]},{"id":"RHSA-2026:35841","title":"Red Hat Security Advisory: nodejs24 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-6734","CVE-2026-9678","CVE-2026-9697","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]},{"id":"SUSE-SU-2026:2647-1","title":"Security update for nodejs22","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9679"]},{"id":"msrc_CVE-2026-11525","title":"undici vulnerable to Set-Cookie SameSite attribute downgrade via permissive substring matching","vulnerabilityIds":["CVE-2026-11525"]},{"id":"SUSE-SU-2026:3929-1","title":"Security update for nodejs20","vulnerabilityIds":["CVE-2025-22150","CVE-2026-11525","CVE-2026-12151","CVE-2026-16728","CVE-2026-16729","CVE-2026-22036","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-54272","CVE-2026-56846","CVE-2026-56847","CVE-2026-56848","CVE-2026-56850","CVE-2026-58039","CVE-2026-58040","CVE-2026-58042","CVE-2026-58043","CVE-2026-58044","CVE-2026-58045","CVE-2026-6733","CVE-2026-69192","CVE-2026-9496","CVE-2026-9679"]},{"id":"RHSA-2026:56431","title":"Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update","vulnerabilityIds":["CVE-2025-61726","CVE-2025-61729","CVE-2025-64718","CVE-2025-68470","CVE-2026-1525","CVE-2026-1526","CVE-2026-1527","CVE-2026-2229","CVE-2026-6321","CVE-2026-6322","CVE-2026-6733","CVE-2026-6734","CVE-2026-9358","CVE-2026-9679","CVE-2026-9697","CVE-2026-11525","CVE-2026-12143","CVE-2026-12151","CVE-2026-13149","CVE-2026-13676","CVE-2026-22036","CVE-2026-25645","CVE-2026-33186","CVE-2026-33349","CVE-2026-33671","CVE-2026-33672","CVE-2026-33750","CVE-2026-34043","CVE-2026-34986","CVE-2026-35469","CVE-2026-39821","CVE-2026-40181","CVE-2026-41305","CVE-2026-41650","CVE-2026-41907","CVE-2026-42342","CVE-2026-45409","CVE-2026-45736","CVE-2026-48779","CVE-2026-48801","CVE-2026-53550","CVE-2026-59869"]},{"id":"SUSE-SU-2026:22565-1","title":"Security update for nodejs24","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-2581","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9678","CVE-2026-9679"]},{"id":"openSUSE-SU-2026:11121-1","title":"corepack24-24.17.0-1.1 on GA media","vulnerabilityIds":["CVE-2026-11525","CVE-2026-12151","CVE-2026-2581","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-6733","CVE-2026-9496","CVE-2026-9678","CVE-2026-9679"]},{"id":"SUSE-SU-2026:3930-1","title":"Security update for nodejs20","vulnerabilityIds":["CVE-2025-22150","CVE-2026-11525","CVE-2026-12151","CVE-2026-16728","CVE-2026-16729","CVE-2026-22036","CVE-2026-27135","CVE-2026-40170","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-54272","CVE-2026-56846","CVE-2026-56847","CVE-2026-56848","CVE-2026-56850","CVE-2026-58039","CVE-2026-58040","CVE-2026-58042","CVE-2026-58043","CVE-2026-58044","CVE-2026-58045","CVE-2026-6733","CVE-2026-69192","CVE-2026-9496","CVE-2026-9679"]},{"id":"RHSA-2026:45783","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-11525","CVE-2026-48617"]},{"id":"WID-SEC-W-2026-2919","title":"IBM App Connect Enterprise: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2024-34459","CVE-2025-10911","CVE-2025-13151","CVE-2025-5278","CVE-2025-6170","CVE-2025-66293","CVE-2026-11525","CVE-2026-12151","CVE-2026-15308","CVE-2026-15709","CVE-2026-15711","CVE-2026-15713","CVE-2026-15714","CVE-2026-31790","CVE-2026-33416","CVE-2026-33636","CVE-2026-34180","CVE-2026-34181","CVE-2026-34182","CVE-2026-34183","CVE-2026-42338","CVE-2026-42764","CVE-2026-42766","CVE-2026-42767","CVE-2026-42768","CVE-2026-42769","CVE-2026-42770","CVE-2026-42771","CVE-2026-45445","CVE-2026-45446","CVE-2026-45447","CVE-2026-47058","CVE-2026-48615","CVE-2026-48618","CVE-2026-48619","CVE-2026-48864","CVE-2026-48928","CVE-2026-48930","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-54369","CVE-2026-54370","CVE-2026-5450","CVE-2026-58016","CVE-2026-65698","CVE-2026-6733","CVE-2026-6734","CVE-2026-7383","CVE-2026-8643","CVE-2026-9076","CVE-2026-9678","CVE-2026-9697"]},{"id":"RHSA-2026:35842","title":"Red Hat Security Advisory: nodejs22 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-6733","CVE-2026-9678","CVE-2026-11525","CVE-2026-12151","CVE-2026-42338","CVE-2026-48615","CVE-2026-48617","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-37758","identifiers":["EUVD-2026-37758","CVE-2026-11525","GHSA-g8m3-5g58-fq7m"]},"retained":false,"historicalAffected":[]}],"coverage":[]}