GHSA-273p-m2cw-6833MediumCVSS 5.3
Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message
🔗 CVE IDs covered (1)
📋 Description
Summary
Rekor’s cose v0.0.1 entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty spec.message. validate() returns nil (success) when message is empty, leaving sign1Msg uninitialized, and Canonicalize() later dereferences v.sign1Msg.Payload.
Impact
A malformed proposed entry of the cose/v0.0.1 type can cause a panic on a thread within the Rekor process. The thread is recovered so the client receives a 500 error message and service still continues, so the availability impact of this is minimal.
Patches
Upgrade to v1.5.0
Workarounds
None
🎯 Affected products1
- go/github.com/sigstore/rekor:<= 1.4.3
🔗 References (5)
- https://github.com/sigstore/rekor/security/advisories/GHSA-273p-m2cw-6833
- https://github.com/sigstore/rekor/commit/39bae3d192bce48ef4ef2cbd1788fb5770fee8cd
- https://github.com/sigstore/rekor/releases/tag/v1.5.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-23831
- https://github.com/advisories/GHSA-273p-m2cw-6833