1sealsemantic last-mile verification

Research / Finding

remote crash in online tlog verification via nil pointer dereference in verifytlogentryoffline

F-COSIGN-004

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

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Recorded evidence

—score not recorded
sigstore/cosign #4649Security PRsigstore/cosign

remote crash in online tlog verification via nil pointer dereference in verifytlogentryoffline

merged
details
Finding IDs
F-COSIGN-004
Status
merged
Reported date
Rationale
prevents remote crash in online tlog verification.
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-004: Input / state handling. A nil transparency-log entry reaches an unchecked access. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-COSIGN-004

Security area (1seal assessment): Availability. A nil transparency-log entry reaches an unchecked access. Reviewed 24 Sep 2026.

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How this page groups evidence

This identifier groups recorded evidence; it is not an additional CVE, independent-vulnerability count or guarantee of vendor confirmation. Fixed code, released versions, attribution and independent discovery are distinct claims. Absent metadata means not recorded, not disproved. Counting rules.