CVEvulnerability

CVE-2026-49478

8.7 HIGH Published 2026-08-13 Modified 2026-10-24 Official page ↗

Status: Deferred
Published: 2026-08-13
Last modified: 2026-10-24
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.7 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Weaknesses: CWE-918

Description

Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-host redirects and attach Kubernetes ServiceAccount tokens during OIDC discovery, allowing a malicious or compromised issuer to perform blind SSRF, substitute and cache malicious JWKS keys, or disclose ServiceAccount tokens to external hosts. Version 1.8.6 blocks cross-host redirects, restricts token injection, and restricts local token loading. No known workarounds are available.

Weakness · CWE (1)

CWE-918 Server-Side Request Forgery weakness

References

https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1 github.com
https://github.com/sigstore/fulcio/pull/2354 github.com
https://github.com/sigstore/fulcio/releases/tag/v1.8.6 github.com
https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6 github.com

CVE-2026-49478

Description

Related

Weakness · CWE (1)

References