Server-Side Request Forgery (SSRF) Affecting cosign package, versions <3.0.4-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-COSIGN-14954783
  • published15 Jan 2026
  • disclosed12 Jan 2026

Introduced: 12 Jan 2026

NewCVE-2026-22772  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Minimos:latest cosign to version 3.0.4-r1 or higher.

NVD Description

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

Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers to bypass MetaIssuer URL validation and trigger SSRF to arbitrary internal services. Since the SSRF only can trigger GET requests, the request cannot mutate state. The response from the GET request is not returned to the caller so data exfiltration is not possible. A malicious actor could attempt to probe an internal network through Blind SSRF. This vulnerability is fixed in 1.8.5.

CVSS Base Scores

version 3.1