{"id":"CVE-2025-66564","revision":null,"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":[]},{"revision":"bd87006499eb46528a783be0a7738892","observedAt":"2026-11-07T03:31:03.866+00:00","statement":{"source":"euvd","id":"EUVD-2025-201319","aliases":["CVE-2025-66564","GHSA-4qg8-fj49-pxjh"],"title":"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. Similar…","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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD 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":null}],"references":["https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh","https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-201319","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Dec 4, 2025, 10:37:13 PM","dateUpdated":"Dec 5, 2025, 2:55:53 PM"},"relatedAdvisories":[{"id":"RHSA-2026:2144","title":"Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release","vulnerabilityIds":["CVE-2025-61729","CVE-2025-64756","CVE-2025-66418","CVE-2025-66471","CVE-2025-66506","CVE-2025-66564","CVE-2026-21441","CVE-2026-22772","CVE-2026-22774","CVE-2026-22775","CVE-2026-23745","CVE-2026-23950"]},{"id":"RHSA-2026:1517","title":"Red Hat Security Advisory: RHACS 4.8.8 security and bug fix update","vulnerabilityIds":["CVE-2025-12816","CVE-2025-15284","CVE-2025-58183","CVE-2025-61729","CVE-2025-66031","CVE-2025-66506","CVE-2025-66564","CVE-2025-68428","CVE-2025-68973","CVE-2026-22029"]},{"id":"RHSA-2026:3825","title":"Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.3","vulnerabilityIds":["CVE-2025-12816","CVE-2025-13465","CVE-2025-15284","CVE-2025-66506","CVE-2025-66564"]},{"id":"RHSA-2026:3710","title":"Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.3","vulnerabilityIds":["CVE-2024-37890","CVE-2025-6545","CVE-2025-6547","CVE-2025-9287","CVE-2025-9288","CVE-2025-12816","CVE-2025-13465","CVE-2025-15284","CVE-2025-66031","CVE-2025-66506","CVE-2025-66564"]},{"id":"RHSA-2026:2568","title":"Red Hat Security Advisory: RHACS 4.9.3 security and bug fix update","vulnerabilityIds":["CVE-2025-12816","CVE-2025-15284","CVE-2025-58183","CVE-2025-66031","CVE-2025-66506","CVE-2025-66564","CVE-2025-68428","CVE-2025-68973","CVE-2026-22029"]},{"id":"RHSA-2026:3087","title":"Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release","vulnerabilityIds":["CVE-2025-13465","CVE-2025-61729","CVE-2025-66564","CVE-2026-22029","CVE-2026-25639"]},{"id":"RHSA-2026:2350","title":"Red Hat Security Advisory: RHACS 4.9.3 security and bug fix update","vulnerabilityIds":["CVE-2025-12816","CVE-2025-15284","CVE-2025-58183","CVE-2025-66031","CVE-2025-66506","CVE-2025-66564","CVE-2025-68428","CVE-2025-68973","CVE-2026-22029"]},{"id":"RHSA-2026:3712","title":"Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.4","vulnerabilityIds":["CVE-2024-37890","CVE-2025-6545","CVE-2025-6547","CVE-2025-9287","CVE-2025-9288","CVE-2025-12816","CVE-2025-13465","CVE-2025-15284","CVE-2025-66031","CVE-2025-66506","CVE-2025-66564"]},{"id":"openSUSE-SU-2026:20191-1","title":"Security update for trivy","vulnerabilityIds":["CVE-2025-64702","CVE-2025-66564"]},{"id":"openSUSE-SU-2026:10131-1","title":"trivy-0.69.0-1.1 on GA media","vulnerabilityIds":["CVE-2025-64702","CVE-2025-66564"]},{"id":"RHSA-2026:2852","title":"Red Hat Security Advisory: OpenShift Security Profiles Operator bug fix and enhancement update","vulnerabilityIds":["CVE-2025-66506","CVE-2025-66564"]},{"id":"RHSA-2026:3827","title":"Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.3","vulnerabilityIds":["CVE-2025-11621","CVE-2025-12044","CVE-2025-47913","CVE-2025-61729","CVE-2025-66506","CVE-2025-66564"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2025-201319","identifiers":["EUVD-2025-201319","CVE-2025-66564","GHSA-4qg8-fj49-pxjh"]},"retained":false,"historicalAffected":[]},{"revision":"a7acf79440134632a9c1e156a5fa6980","observedAt":"2026-10-25T03:17:36.152+00:00","statement":{"source":"nvd","id":"CVE-2025-66564","aliases":[],"title":"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. Similar…","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":"2025-12-04T23:15:47.43+00:00","modifiedAt":"2026-10-18T15:10:00.097+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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/commit/0cae34e197d685a14904e0bad135b89d13b69421","https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66564","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-405"],"productCriteria":["cpe:2.3:a:linuxfoundation:sigstore_timestamp_authority:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2025-12-04T23:15:47.430","lastModified":"2026-10-18T15:10:00.097"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-66564","identifiers":["CVE-2025-66564"]},"retained":false,"historicalAffected":[]},{"revision":"5ea0258fedfb4e51ad046e78611e2033","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-4qg8-fj49-pxjh","aliases":["CVE-2025-66564","GO-2025-4192"],"title":"Sigstore Timestamp Authority allocates excessive memory during request parsing","description":"### Impact\n\n**Excessive memory allocation**\n\nFunction [api.ParseJSONRequest](https://github.com/sigstore/timestamp-authority/blob/26d7d426d3000abdbdf2df34de56bb92246c0365/pkg/api/timestamp.go#L63) currently splits (via a call to [strings.Split](https://pkg.go.dev/strings#Split)) an optionally-provided OID (which is untrusted data) on periods. Similarly, function [api.getContentType](https://github.com/sigstore/timestamp-authority/blob/26d7d426d3000abdbdf2df34de56bb92246c0365/pkg/api/timestamp.go#L114) splits the `Content-Type` header (which is also untrusted data) on an `application` string.\n\nAs 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). Relevant weakness: [CWE-405: Asymmetric Resource Consumption (Amplification)](https://cwe.mitre.org/data/definitions/405.html)\n\n### Patches\n\nUpgrade to v2.0.3.\n\n### Workarounds\n\nThere are no workarounds with the service itself. If the service is behind a load balancer, configure the load balancer to reject excessively large requests.","state":0,"publishedAt":"2025-12-05T18:19:00+00:00","modifiedAt":"2026-09-10T03:50:31.4139972+00:00","affected":[{"ecosystem":"Go","name":"github.com/sigstore/timestamp-authority","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.0.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh","https://nvd.nist.gov/vuln/detail/CVE-2025-66564","https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421","https://github.com/sigstore/timestamp-authority"],"sourceUrl":"https://github.com/advisories/GHSA-4qg8-fj49-pxjh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-4qg8-fj49-pxjh","identifiers":["GHSA-4qg8-fj49-pxjh","CVE-2025-66564","GO-2025-4192"]},"retained":false,"historicalAffected":[]},{"revision":"0305743a3a7e4042b453799c5de561c4","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2025-4192","aliases":["CVE-2025-66564","GHSA-4qg8-fj49-pxjh"],"title":"Sigstore Timestamp Authority allocates excessive memory during request parsing in github.com/sigstore/timestamp-authority","description":"Sigstore Timestamp Authority allocates excessive memory during request parsing in github.com/sigstore/timestamp-authority","state":0,"publishedAt":"2025-12-08T21:31:36+00:00","modifiedAt":"2026-02-04T03:13:38.955698+00:00","affected":[{"ecosystem":"Go","name":"github.com/sigstore/timestamp-authority","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/sigstore/timestamp-authority/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.0.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh","https://nvd.nist.gov/vuln/detail/CVE-2025-66564","https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421"],"sourceUrl":"https://osv.dev/vulnerability/GO-2025-4192","license":"OSV · upstream source license applies","key":"osv:GO-2025-4192","identifiers":["GO-2025-4192","CVE-2025-66564","GHSA-4qg8-fj49-pxjh"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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