Server-Side Request Forgery (SSRF) Affecting chainctl package, versions <0.2.300-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (21st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CHAINCTL-17759099
  • published1 Jul 2026
  • disclosed13 Aug 2026

Introduced: 1 Jul 2026

CVE-2026-49478  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Chainguard chainctl to version 0.2.300-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream chainctl package and not the chainctl package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1