CVE-2026-56684

{"id": "CVE-2026-56684", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56684", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-18T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "valkey-io", "product": "valkey", "versions": [{"status": "affected", "version": "< 7.2.14"}, {"status": "affected", "version": ">= 8.0.0, < 8.0.10"}, {"status": "affected", "version": ">= 8.1.0, < 8.1.9"}, {"status": "affected", "version": ">= 9.0.0, < 9.0.5"}, {"status": "affected", "version": ">= 9.1.0, < 9.1.1"}]}]}], "published": "2026-08-18T15:16:55.463", "references": [{"url": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/pull/4234", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh", "source": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1."}], "lastModified": "2026-08-19T04:17:24.760", "sourceIdentifier": "security-advisories@github.com"}