{"id":"CVE-2026-115775","summary":"Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree","details":"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.","aliases":["GHSA-3476-c5c2-fr73"],"modified":"2026-10-25T02:45:47.077734154Z","published":"2026-10-23T20:16:29.913Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115775.json","unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"fixed":"26.10.0rc1"}]}]},{"extracted_events":[{"range":[{"introduced":"3.6+"},{"fixed":"26.10.0rc1"},{"fixed":"26.10.0rc1"}],"source":"DESCRIPTION"}]}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-400","CWE-770"]},"references":[{"type":"WEB","url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115775.json"},{"type":"ADVISORY","url":"https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115775"},{"type":"FIX","url":"https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0"},{"type":"FIX","url":"https://github.com/twisted/twisted/pull/12751"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/twisted/twisted","events":[{"introduced":"0"},{"fixed":"8873814bec8288e2466fad4d2c4d64039beb88b0"},{"fixed":"875d118c9a82a4f55a92ff399bd31f8928a52ad3"}],"database_specific":{"extracted_events":[{"source":"REFERENCES_COMMIT","range":[{"fixed":"8873814bec8288e2466fad4d2c4d64039beb88b0"}]},{"range":[{"fixed":"875d118c9a82a4f55a92ff399bd31f8928a52ad3"}],"source":"REFERENCES_TAG","original_tag":"twisted-26.10.0rc1"}]}}],"versions":["before-black"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115775.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}