CVE Explorer
CVE-2026-11525
Impact:
When 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).
Affected applications are those that consume Set-Cookie header
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","packageURL":"pkg:npm/undici","product":"undici","vendor":"undici","versions":[{"lessThan":"6.26.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"6.26.0","versionType":"semver"},{"lessThan":"7.28.0","status":"affected","version":"7.0.0","versionType":"semver"},{"status":"unaffected","version":"7.28.0","versionType":"semver"},{"lessThan":"8.5.0","status":"affected","version":"8.0.0","versionType":"semver"},{"status":"unaffected","version":"8.5.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d9e7714f2ce2fc2be7a9d2f02860d9eadf57a384498ec0e30c22f4d159b9c80d · sha256:00eae1d533b1f6f3… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:d9e7714f2ce2fc2be7a9d2f02860d9eadf57a384498ec0e30c22f4d159b9c80d · sha256:00eae1d533b1f6f3… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-183","description":"CWE-183: Permissive List of Allowed Inputs","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:d9e7714f2ce2fc2be7a9d2f02860d9eadf57a384498ec0e30c22f4d159b9c80d · sha256:00eae1d533b1f6f3… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"url":"https://cna.openjsf.org/security-advisories.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d9e7714f2ce2fc2be7a9d2f02860d9eadf57a384498ec0e30c22f4d159b9c80d · sha256:00eae1d533b1f6f3… · /containers/cna/references/1
{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-g8m3-5g58-fq7m"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d9e7714f2ce2fc2be7a9d2f02860d9eadf57a384498ec0e30c22f4d159b9c80d · sha256:00eae1d533b1f6f3… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.