Server-side Request Forgery (SSRF) Affecting github.com/sigstore/fulcio/pkg/identity/base package, versions <1.8.5
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMSIGSTOREFULCIOPKGIDENTITYBASE-14928060
- published15 Jan 2026
- disclosed13 Jan 2026
- creditMor Weinberger
Introduced: 13 Jan 2026
CVE-2026-22772 Â (opens in a new tab)How to fix?
Upgrade github.com/sigstore/fulcio/pkg/identity/base to version 1.8.5 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the metaRegex function. An attacker can access internal network resources by crafting a malicious issuer URL that bypasses validation and causes the system to send HTTP GET requests to arbitrary internal endpoints.