{"id":"CVE-2026-57196","title":"Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages","summary":"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 unauthenticated attacker may use reflected cross-site script…","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"asterisk","product":"asterisk","affected":["asterisk < 20.20.1","asterisk >= 21.0.0-pre1, < 21.12.3","asterisk >= 22.0.0-pre1, < 22.10.1","asterisk >= 23.0.0-pre1, < 23.4.1","certified-asterisk < 20.7-cert11","certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T19:44:31.470203Z"},"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T20:13:49.872Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57196","references":[{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp","label":"https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp"},{"url":"https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8","label":"https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8"},{"url":"https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10","label":"https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10"},{"url":"https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343","label":"https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343"},{"url":"https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3","label":"https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3"},{"url":"https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0","label":"https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0"},{"url":"https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8","label":"https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8"},{"url":"https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac","label":"https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac"},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","label":"https://github.com/asterisk/asterisk/releases/tag/20.20.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","label":"https://github.com/asterisk/asterisk/releases/tag/21.12.3"},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","label":"https://github.com/asterisk/asterisk/releases/tag/22.10.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","label":"https://github.com/asterisk/asterisk/releases/tag/23.4.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","label":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","label":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","label":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T19:38:01.116Z","epss":0.00767,"epssPercentile":0.55315,"slug":"CVE-2026-57196","body":"## Overview\n\nAsterisk 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 unauthenticated attacker may use reflected cross-site scripting in `phone provisioning HTTP error pages` to retrieve an authorized user's `AMI session cookie` and impersonate that user when `res_phoneprov` is enabled. The Asterisk HTTP web server, Asterisk Manager Interface (AMI), and AMI access via HTTP must all be enabled; each is disabled by default. The attacker must be able to connect to the HTTP server, which binds only to `127.0.0.1` by default even when enabled, and must convince the authorized user to click a malicious link. 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.\n\n## Affected\n\n- `asterisk < 20.20.1`\n- `asterisk >= 21.0.0-pre1, < 21.12.3`\n- `asterisk >= 22.0.0-pre1, < 22.10.1`\n- `asterisk >= 23.0.0-pre1, < 23.4.1`\n- `certified-asterisk < 20.7-cert11`\n- `certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":13,"depthScoreParts":{"impact":12.6,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}