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CVE-2026-23831

Rekor COSE v0.0.1 Canonicalize crashes when passed empty Message

Published: Jan 22, 2026Updated: Feb 2, 2026 Sources: CVE List NVD GHSACWE-476
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 68.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-476

Affected Products

Go
package-ecosystem
github.com/sigstore/rekor
OSS Libraries
sigstore
oss-projectaka gitsign, cosign, rekor
rekorOn-prem
Security Products / pki-crypto
linuxfoundation
oss-project·USaka yocto, everest, pytorch
rekorOn-prem
AI / ML

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://github.com/sigstore/rekor/security/advisories/GHSA-273p-m2cw-6833
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-23831
nvd.nist.gov
https://github.com/sigstore/rekor/commit/39bae3d192bce48ef4ef2cbd1788fb5770fee8cd
github.com
and 2 more references View all →

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