{"id":"CVE-2026-115775","state":"PUBLISHED","title":"Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree","description":"Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1.","publishedAt":"2026-10-23T20:16:29.913Z","updatedAt":"2026-10-29T18:14:18.997Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["twisted twisted"],"affected":[{"vendor":"twisted","product":"twisted","versions":[{"version":"< 26.10.0rc1","status":"affected"}]}],"references":["https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73","https://github.com/twisted/twisted/pull/12751","https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0","https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"],"weaknesses":["CWE-400","CWE-770"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/115xxx/CVE-2026-115775.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115775","state":"PUBLISHED","datePublished":"2026-10-23T20:16:29.913Z","dateUpdated":"2026-10-29T18:14:18.997Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-23T13:28:51.847Z"},"containers":{"cna":{"title":"Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree","descriptions":[{"lang":"en","value":"Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1."}],"affected":[{"vendor":"twisted","product":"twisted","versions":[{"version":"< 26.10.0rc1","status":"affected"}]}],"references":[{"url":"https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73","name":"https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/twisted/twisted/pull/12751","name":"https://github.com/twisted/twisted/pull/12751","tags":["x_refsource_MISC"]},{"url":"https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0","name":"https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0","tags":["x_refsource_MISC"]},{"url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","name":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-23T20:16:29.913Z"},"source":{"advisory":"GHSA-3476-c5c2-fr73","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T18:13:46.702578Z","id":"CVE-2026-115775","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T18:14:18.997Z"}}]}}}