GHSA-273p-m2cw-6833
Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message
At a glance
- Published
- Updated
- CVE
- CVE-2026-23831
- Aliases
- GO-2026-4354
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 packages
| Package | Versions |
|---|---|
| Go · github.com/sigstore/rekor | introduced 0, fixed 1.5.0 |
References
- https://github.com/sigstore/rekor/security/advisories/GHSA-273p-m2cw-6833 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-23831 ADVISORY
- https://github.com/sigstore/rekor/commit/39bae3d192bce48ef4ef2cbd1788fb5770fee8cd WEB
- https://github.com/sigstore/rekor PACKAGE
- https://github.com/sigstore/rekor/releases/tag/v1.5.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |