{"cve":"CVE-2026-4525","nvd":{"published":"2026-04-17T04:16:09.997","modified":"2026-10-25T23:10:00.167","status":"Modified","description":"If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-201"],"references":["https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344","https://access.redhat.com/security/cve/CVE-2026-4525","https://bugzilla.redhat.com/show_bug.cgi?id=2459107","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json"],"products":["hashicorp:vault"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-4525","score":0.00406,"percentile":0.34547,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-72gw-fmmr-c4r4","url":"https://osv.dev/vulnerability/GHSA-72gw-fmmr-c4r4","summary":"HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization","modified":"2026-09-10T03:50:43.378842123Z","packages":[{"ecosystem":"Go","name":"github.com/hashicorp/vault","purl":"pkg:golang/github.com/hashicorp/vault","ranges":[">=0.11.2 <=1.21.4"],"fixed":[]}]},{"id":"GO-2026-5199","url":"https://osv.dev/vulnerability/GO-2026-5199","summary":"HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization in github.com/hashicorp/vault","modified":"2026-07-02T16:59:31.167190879Z","packages":[{"ecosystem":"Go","name":"github.com/hashicorp/vault","purl":"pkg:golang/github.com/hashicorp/vault","ranges":[">=0.11.2"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}