{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57585", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-24T18:49:56.209Z", "datePublished": "2026-06-30T21:36:23.418Z", "dateUpdated": "2026-06-30T21:36:23.418Z"}, "containers": {"cna": {"title": "MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error", "problemTypes": [{"descriptions": [{"cweId": "CWE-416", "lang": "en", "description": "CWE-416: Use After Free", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/msgpack/msgpack-python/security/advisories/GHSA-6v7p-g79w-8964", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/msgpack/msgpack-python/security/advisories/GHSA-6v7p-g79w-8964"}, {"name": "https://github.com/msgpack/msgpack-python/commit/2c56ddb5d0025ed481d962c0f5d62d19dec7476d", "tags": ["x_refsource_MISC"], "url": "https://github.com/msgpack/msgpack-python/commit/2c56ddb5d0025ed481d962c0f5d62d19dec7476d"}], "affected": [{"vendor": "msgpack", "product": "msgpack-python", "versions": [{"version": "< 1.2.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-30T21:36:23.418Z"}, "descriptions": [{"lang": "en", "value": "MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1."}], "source": {"advisory": "GHSA-6v7p-g79w-8964", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.2.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "msgpack-python", "vendor": "msgpack"}], "created": "2026-07-01T00:15:05.401155+00:00", "updated": "2026-07-01T10:00:53.729898+00:00", "vendors": ["msgpack", "msgpack$PRODUCT$msgpack-python"]}