CVE-2025-66564
Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits the Content-Type header (which is also untrusted data) on an application string. As a result, in the face of a malicious request with either an excessively long OID in the payload containing many period characters or a malformed Content-Type header, a call to api.ParseJSONRequest or api.getContentType incurs allocations of O(n) bytes (where n stands for the length of the function's argument). This vulnerability is fixed in 2.0.3.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)
- CWE
- CWE-405
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linuxfoundation:sigstore_timestamp_authority
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4qg8-fj49-pxjh | Go | github.com/sigstore/timestamp-authority | <2.0.3 | 2.0.3 |
| GO-2025-4192 | Go | github.com/sigstore/timestamp-authority | all versions | no fix published |
| GO-2025-4192 | Go | github.com/sigstore/timestamp-authority/v2 | <2.0.3 | 2.0.3 |