{"schema_version":"1","data":[{"id":3824,"advisory_id":"fe1c5695-b0f2-452c-bf25-df140fb2fe1e","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-63209","source_published_at":"2026-09-29T14:58:53.366+00:00","published_at":"2026-10-24T21:41:07.446684+00:00","extraction_method":"structured","technologies":["compress","core-cve"],"cve_ids":["CVE-2026-63209"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Integer Overflow or Wraparound and Out-of-bounds Write in compress","summary":"compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.","evidence":"cve:CVE-2026-63209","products":[{"name":{"value":"compress","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-63209","aliases":["CVE-2026-63209"],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}}],"affected":[{"vendor":"klauspost","product":"compress","versions":[{"status":"affected","version":"< 1.18.7"}]}],"modified":"2026-09-29T16:32:32.677Z","provider":"cve","references":["https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw","https://github.com/klauspost/compress/commit/539243b8823ee8f03e49969823d57c348c917536","https://github.com/klauspost/compress/releases/tag/v1.18.7"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-63209","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-29T16:31:39.668233Z"}}}],"references":[{"url":"https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw","tags":["exploit"]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T16:32:32.677Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-29T14:58:53.366Z"}}},"related_cves":[{"value":"CVE-2026-63209","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"priority":{"reasons":["publisher_severity"],"severity":"high","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"high"},"context_update":false}],"next_after":3824,"next_before":3824}