{"id":"CVE-2026-115775","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115775","generatedAt":"2026-10-28T07:42:40.883Z","title":"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.","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.","published":"2026-10-23T21:17:23.000Z","lastModified":"2026-10-26T14:05:17.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-400","CWE-770"],"affected":[],"epss":{"score":0.00444,"percentile":0.38405,"date":"2026-10-27","history":[{"date":"2026-10-24","score":0.00658,"percentile":0.50949}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-23T21:17:23.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-10-23T21:17:23.050Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/pull/12751","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115775","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}