{"id":"CVE-2026-57188","aliases":[],"title":"Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling","titleSource":"GitHub_M","descriptionSource":"GitHub_M","products":[{"vendor":"asterisk","name":"asterisk","platforms":[],"versions":[{"version":"< 20.20.1","status":"affected"},{"version":">= 21.0.0-pre1, < 21.12.3","status":"affected"},{"version":">= 22.0.0-pre1, < 22.10.1","status":"affected"},{"version":">= 23.0.0-pre1, < 23.4.1","status":"affected"}],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-57188"},{"vendor":"asterisk","name":"certified-asterisk","platforms":[],"versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-57188"}],"remediation":[],"description":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a stack buffer overflow in `res_xmpp` `XMPP namespace prefix` handling using carefully crafted packets. The `res_xmpp` module must be loaded, an XMPP connection must be configured in `xmpp.conf`, and the attacker must have an XMPP account on the same or a federated server. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.","severity":"high","score":7.1,"published":"2026-10-27T17:55:29.170Z","modified":"2026-10-27T17:55:29.170Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/asterisk/asterisk/security/advisories/GHSA-mxgm-8c6f-5p8f","https://github.com/asterisk/asterisk/commit/12072a559f592736a44dd9fbe1594e84714edfb4","https://github.com/asterisk/asterisk/commit/1328dbb503da4aa11a480a9c28e170f17e5f4e84","https://github.com/asterisk/asterisk/commit/3c4b08cf94eeaa3faefb3ae6c2d6ce1bd9747a13","https://github.com/asterisk/asterisk/commit/433102c16b8edfc31d28c96166fef03fe72fb923","https://github.com/asterisk/asterisk/commit/5e626250628b2579530f3f17e7b0aa37d082873b","https://github.com/asterisk/asterisk/commit/d570a85e45153a36919ace5d0ab06a195b30f9d1","https://github.com/asterisk/asterisk/commit/e329a6803ac5214028f98cc5f0b7167d66e32c08","https://github.com/asterisk/asterisk/releases/tag/20.20.1","https://github.com/asterisk/asterisk/releases/tag/21.12.3","https://github.com/asterisk/asterisk/releases/tag/22.10.1","https://github.com/asterisk/asterisk/releases/tag/23.4.1","https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","https://github.com/asterisk/asterisk/tree/24.0.0-pre1"],"sources":[{"name":"CVE","id":"CVE-2026-57188","modified":"2026-10-27T17:55:29.170Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-57188"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":7.1}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:40:30.742Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}