SB2026040725 - Security features bypass in Cosign
Published: April 7, 2026
Security Bulletin ID
SB2026040725
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Security features bypass (CVE-ID: N/A)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to a logic flaw in the error handling of the predicate type validation in cosign verify-blob-attestation. A remote attacker can cause the application to trust the unexpected attestation type.
Remediation
Install update from vendor's website.