{"id":"EUVD-2026-22813","revision":"908039e8cba84b19836d523e3f0f9134","records":[{"revision":"908039e8cba84b19836d523e3f0f9134","observedAt":"2026-10-28T05:00:34.638+00:00","statement":{"source":"euvd","id":"EUVD-2026-22813","aliases":["CVE-2026-39984","GHSA-xm5m-wgh2-rrg3"],"title":"Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the VerifyTimestampResponse function. VerifyTimestampResponse correctly verifies the certif…","description":"Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the VerifyTimestampResponse function. VerifyTimestampResponse correctly verifies the certificate chain signature, but the TSA-specific constraint checks in VerifyLeafCert uses the first non-CA certificate from the PKCS#7 certificate bag instead of the leaf certificate from the verified chain. An attacker can exploit this by prepending a forged certificate to the certificate bag while the message is signed with an authorized key, causing the library to validate the signature against one certificate but perform authorization checks against another. This vulnerability only affects users of the timestamp-authority/v2/pkg/verification package and does not affect the timestamp-authority service itself or sigstore-go. The issue has been fixed in version 2.0.6.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":5.5,"severity":null}],"references":["https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-xm5m-wgh2-rrg3","https://github.com/sigstore/timestamp-authority/releases/tag/v2.0.6"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-22813","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 14, 2026, 11:41:47 PM","dateUpdated":"Apr 16, 2026, 2:00:55 PM"},"relatedAdvisories":[{"id":"SUSE-SU-2026:22456-1","title":"Security update for docker","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]},{"id":"openSUSE-SU-2026:10651-1","title":"trivy-0.70.0-1.1 on GA media","vulnerabilityIds":["CVE-2025-69725","CVE-2026-25934","CVE-2026-33186","CVE-2026-33747","CVE-2026-33748","CVE-2026-34986","CVE-2026-39984"]},{"id":"openSUSE-SU-2026:10702-1","title":"hauler-1.4.3-1.1 on GA media","vulnerabilityIds":["CVE-2026-34986","CVE-2026-39984"]},{"id":"openSUSE-SU-2026:20711-1","title":"Security update for hauler","vulnerabilityIds":["CVE-2026-34986","CVE-2026-39984"]},{"id":"openSUSE-SU-2026:21060-1","title":"Security update for docker","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]},{"id":"openSUSE-SU-2026:11144-1","title":"docker-29.4.0_ce-40.1 on GA media","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]},{"id":"WID-SEC-W-2026-3046","title":"IBM Concert: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2019-19921","CVE-2021-23337","CVE-2024-3651","CVE-2024-39338","CVE-2024-45590","CVE-2025-13465","CVE-2025-15284","CVE-2025-15599","CVE-2025-22874","CVE-2025-47273","CVE-2025-47907","CVE-2025-52881","CVE-2025-53643","CVE-2025-55184","CVE-2025-58056","CVE-2025-58188","CVE-2025-58189","CVE-2025-61723","CVE-2025-61730","CVE-2025-64649","CVE-2025-64756","CVE-2025-67221","CVE-2025-68121","CVE-2025-68146","CVE-2026-0540","CVE-2026-2327","CVE-2026-23490","CVE-2026-23897","CVE-2026-2391","CVE-2026-23949","CVE-2026-24486","CVE-2026-25528","CVE-2026-25547","CVE-2026-25639","CVE-2026-25990","CVE-2026-26007","CVE-2026-26019","CVE-2026-26996","CVE-2026-27142","CVE-2026-27212","CVE-2026-27699","CVE-2026-27903","CVE-2026-27904","CVE-2026-28684","CVE-2026-29063","CVE-2026-29181","CVE-2026-2950","CVE-2026-31808","CVE-2026-31900","CVE-2026-32274","CVE-2026-32288","CVE-2026-32597","CVE-2026-32630","CVE-2026-32887","CVE-2026-32952","CVE-2026-33186","CVE-2026-33532","CVE-2026-33750","CVE-2026-33814","CVE-2026-33816","CVE-2026-33916","CVE-2026-34043","CVE-2026-34073","CVE-2026-34077","CVE-2026-3520","CVE-2026-35469","CVE-2026-35515","CVE-2026-3627","CVE-2026-39823","CVE-2026-39825","CVE-2026-39826","CVE-2026-39892","CVE-2026-39984","CVE-2026-40175","CVE-2026-40179","CVE-2026-40181","CVE-2026-40190","CVE-2026-40347","CVE-2026-41066","CVE-2026-41182","CVE-2026-41238","CVE-2026-41239","CVE-2026-41240","CVE-2026-41305","CVE-2026-41324","CVE-2026-41425","CVE-2026-41481","CVE-2026-41488","CVE-2026-41602","CVE-2026-41636","CVE-2026-42151","CVE-2026-42154","CVE-2026-42198","CVE-2026-42211","CVE-2026-42338","CVE-2026-42342","CVE-2026-42561","CVE-2026-42577","CVE-2026-43870","CVE-2026-44405","CVE-2026-44431","CVE-2026-44432","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44496","CVE-2026-44728","CVE-2026-4539","CVE-2026-45409","CVE-2026-45736","CVE-2026-46625","CVE-2026-4800","CVE-2026-4923","CVE-2026-4926","CVE-2026-7246","CVE-2026-8723"]},{"id":"SUSE-SU-2026:22285-1","title":"Security update for docker","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]},{"id":"SUSE-SU-2026:22367-1","title":"Security update for docker","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]},{"id":"openSUSE-SU-2026:20809-1","title":"Security update for trivy","vulnerabilityIds":["CVE-2025-64702","CVE-2025-69725","CVE-2026-25934","CVE-2026-33186","CVE-2026-33747","CVE-2026-33748","CVE-2026-34986","CVE-2026-39984","CVE-2026-41506"]},{"id":"SUSE-SU-2026:22513-1","title":"Security update for docker","vulnerabilityIds":["CVE-2026-33814","CVE-2026-39821","CVE-2026-39984","CVE-2026-41567"]}],"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-2026-22813","identifiers":["EUVD-2026-22813","CVE-2026-39984","GHSA-xm5m-wgh2-rrg3"]},"retained":false,"historicalAffected":[]}],"coverage":[]}