Rekor is a software supply chain transparency log. In versions 1.4.3 and below, the entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty spec.message, causing nil Pointer Dereference. Function validate() returns nil (success) when message is empty, leaving sign1Msg uninitialized, and Canonicalize() later dereferences v.sign1Msg.Payload. 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. This issue has been fixed in version 1.5.0.
Metrics
Affected Vendors & Products
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-273p-m2cw-6833 | Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 23 Jan 2026 00:15:00 +0000
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threat_severity
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threat_severity
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Thu, 22 Jan 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Rekor is a software supply chain transparency log. In versions 1.4.3 and below, the entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty spec.message, causing nil Pointer Dereference. Function validate() returns nil (success) when message is empty, leaving sign1Msg uninitialized, and Canonicalize() later dereferences v.sign1Msg.Payload. 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. This issue has been fixed in version 1.5.0. | |
| Title | Rekor COSE v0.0.1 Canonicalize crashes when passed empty Message | |
| Weaknesses | CWE-476 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-01-22T21:26:22.183Z
Reserved: 2026-01-16T15:46:40.841Z
Link: CVE-2026-23831
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-01-22T22:16:19.523
Modified: 2026-01-22T22:16:19.523
Link: CVE-2026-23831
Redhat
OpenCVE Enrichment
No data.
Weaknesses