remote crash in policy evaluation via unsafe attestation payload type assertion

F-COSIGN-006

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

—score not recorded

sigstore/cosign #4651Security PRsigstore/cosign

remote crash in policy evaluation via unsafe attestation payload type assertion

merged

details

Finding IDs: F-COSIGN-006
Status: merged
Reported date: 20 Jan 2026
Rationale: prevents remote crash via malformed attestation payloads.
PR opened by: @1seal
PR state observed: closed; GitHub merged: true; 2026-09-24
PR observation basis: Public PR metadata recorded in the 2026-09-24 evidence audit; not a live status feed.
Contribution boundary: @1seal opened this PR; this alone does not establish sole code authorship.

F-COSIGN-006: Input / state handling. Malformed attestation input reaches an unchecked type assertion. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-COSIGN-006

Security area (1seal assessment): Availability. Malformed attestation input reaches an unchecked type assertion. Reviewed 24 Sep 2026.

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