{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73213","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-11T14:41:20.121Z","datePublished":"2026-08-11T17:33:12.757Z","dateUpdated":"2026-08-13T14:52:10.582Z"},"containers":{"cna":{"title":"Coturn: `addr_less_eq()` does a component-wise IPv6 comparison instead of a lexicographic one, letting an authenticated TURN client bypass `denied-peer-ip`/`allowed-peer-ip` IPv6 ranges (TURN-specific SSRF)","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":5.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","version":"4.0"}}],"references":[{"name":"https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99"},{"name":"https://github.com/coturn/coturn/commit/6c13608c28a04af5d63abddd7565a0dcc4771c28","tags":["x_refsource_MISC"],"url":"https://github.com/coturn/coturn/commit/6c13608c28a04af5d63abddd7565a0dcc4771c28"},{"name":"https://github.com/coturn/coturn/releases/tag/4.16.0","tags":["x_refsource_MISC"],"url":"https://github.com/coturn/coturn/releases/tag/4.16.0"}],"affected":[{"vendor":"coturn","product":"coturn","versions":[{"version":"< 4.16.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-11T17:33:12.757Z"},"descriptions":[{"lang":"en","value":"Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, addr_less_eq() in src/client/ns_turn_ioaddr.c uses a component-wise comparison for native IPv6 min-max intervals in ioa_addr_in_range(), allowing an authenticated TURN client to relay to an IPv6 peer that is numerically within a configured non-prefix-aligned denied-peer-ip range but is classified as outside it. This issue is fixed in version 4.16.0."}],"source":{"advisory":"GHSA-4v97-rxjj-4f99","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T14:52:04.854291Z","id":"CVE-2026-73213","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"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":"2026-08-13T14:52:10.582Z"}}]}}