{"id":"CVE-2025-66564","revision":"56f0cd3f985b44749edf9ed9c4139ed7","records":[{"revision":"56f0cd3f985b44749edf9ed9c4139ed7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66564","aliases":[],"title":"Sigstore Timestamp Authority allocates excessive memory during request parsing","description":"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.","state":0,"publishedAt":"2025-12-04T22:37:13.307+00:00","modifiedAt":"2025-12-05T14:55:53.273+00:00","affected":[{"ecosystem":"Vendor product","name":"timestamp-authority","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sigstore\",\n                    \"product\": \"timestamp-authority\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.0.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh","https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-66564","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-66564","identifiers":["CVE-2025-66564"]},"retained":false,"historicalAffected":[]}],"coverage":[]}