Is github.com/sigstore/cosign affected by CVE-2026-22703?

Go github.com/sigstore/cosign is affected in >=0.

Is CVE-2026-22703 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.1%.

medium

CVE-2026-22703

Go · github.com/sigstore/cosign • Go · github.com/sigstore/cosign/v2 • Go · github.com/sigstore/cosign/v3

Summary

Cosign verification accepts any valid Rekor entry under certain conditions in github.com/sigstore/cosign

Severity: medium
EPSS: 0.1% (p0)
Also known as: GHSA-whqx-f9j3-ch6m, GHSA-whqx-f9j3-ch6m#github.com/sigstore/cosign/v2, GHSA-whqx-f9j3-ch6m#github.com/sigstore/cosign/v3, BIT-cosign-2026-22703, GO-2026-4309, GO-2026-4309#github.com/sigstore/cosign, GO-2026-4309#github.com/sigstore/cosign/v2, GO-2026-4309#github.com/sigstore/cosign/v3
Published: 2026-01-13

References

Related advisories

CVE-2026-39395 — medium · Go/github.com/sigstore/cosign
CVE-2026-24122 — medium · Go/github.com/sigstore/cosign

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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.