{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116591", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-26T15:03:39.037Z", "datePublished": "2026-10-26T21:54:33.109Z", "dateUpdated": "2026-10-27T14:16:30.395Z"}, "containers": {"cna": {"title": "compress zstd: Panic on two-block frames", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8"}, {"name": "https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d", "tags": ["x_refsource_MISC"], "url": "https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d"}, {"name": "https://github.com/klauspost/compress/releases/tag/v1.20.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/klauspost/compress/releases/tag/v1.20.2"}], "affected": [{"vendor": "klauspost", "product": "compress", "versions": [{"version": "< 1.20.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-26T21:55:20.476Z"}, "descriptions": [{"lang": "en", "value": "compress provides various compression algorithms. Prior to 1.20.2, the zstd DecodeAll and streaming decoder paths can panic when a crafted two-block frame reaches huff0.ReadTable with an FSE normalized count of 32768 that readNCount stores in int16 as -32768. The wrapped count allows buildDtable to retain stale fse.Scratch decode-table state from the prior block, and nextFast then derives an out-of-range state and indexes beyond the table instead of returning a decode error. Both blocks are required to preserve and then reuse the stale state, allowing untrusted zstd input to crash an application. This issue is fixed in version 1.20.2."}], "source": {"advisory": "GHSA-fpmh-frq8-7rj8", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-27T13:46:04.382421Z", "id": "CVE-2026-116591", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-27T14:16:30.395Z"}}]}}

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{}

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