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Details of issue NIXPKGS-2026-0953

NIXPKGS-2026-0953
published 2 months, 2 weeks ago
Permalink CVE-2026-39395
4.3 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): Required (R)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): Low (L)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): Required (R)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): Low (L)
  • Modified Availability (MA): None (N)
updated 2 months, 2 weeks ago by @LeSuisse Activity log
  • Created suggestion 2 months, 2 weeks ago
  • @LeSuisse deleted
    3 maintainers
    • @06kellyjac
    • @developer-guy
    • @LeSuisse
    2 months, 2 weeks ago maintainer.delete
  • @LeSuisse accepted 2 months, 2 weeks ago
  • @LeSuisse published on GitHub 2 months, 2 weeks ago
Cosign's verify-blob-attestation reports false positive when payload parsing fails

Cosign provides code signing and transparency for containers and binaries. Prior to 3.0.6 and 2.6.3, cosign verify-blob-attestation may erroneously report a "Verified OK" result for attestations with malformed payloads or mismatched predicate types. For old-format bundles and detached signatures, this was due to a logic flaw in the error handling of the predicate type validation. For new-format bundles, the predicate type validation was bypassed completely. This vulnerability is fixed in 3.0.6 and 2.6.3.

Affected products

cosign
  • ==< 2.6.3
  • ==>= 3.0.0, < 3.0.6

Matching in nixpkgs

pkgs.cosign

Container Signing CLI with support for ephemeral keys and Sigstore signing

Package maintainers

Ignored maintainers (3)