Is github.com/sigstore/fulcio affected by CVE-2026-22772?

Go github.com/sigstore/fulcio is affected in <1.8.5.

Is CVE-2026-22772 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-22772

Q: Is CVE-2026-22772 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

Go · github.com/sigstore/fulcio

Summary

Fulcio is vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass in github.com/sigstore/fulcio

Severity: medium
EPSS: 0.2% (p12)
Also known as: GHSA-59jp-pj84-45mr, GO-2026-4311
Published: 2026-01-23

References

https://github.com/sigstore/fulcio/security/advisories/GHSA-59jp-pj84-45mr
https://nvd.nist.gov/vuln/detail/CVE-2026-22772
https://github.com/sigstore/fulcio/commit/eaae2f2be56df9dea5f9b439ec81bedae4c0978d

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.