{"id":"CVE-2026-57196","state":"PUBLISHED","title":"Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages","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 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.","publishedAt":"2026-10-26T19:27:35.360Z","updatedAt":"2026-10-26T20:13:49.872Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["asterisk asterisk","asterisk certified-asterisk"],"affected":[{"vendor":"asterisk","product":"asterisk","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"}]},{"vendor":"asterisk","product":"certified-asterisk","versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}]}],"references":["https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp","https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8","https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10","https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343","https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3","https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0","https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8","https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac","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"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57196.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57196","state":"PUBLISHED","datePublished":"2026-10-26T19:27:35.360Z","dateUpdated":"2026-10-26T20:13:49.872Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-24T02:00:46.800Z"},"containers":{"cna":{"title":"Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"asterisk","product":"asterisk","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"}]},{"vendor":"asterisk","product":"certified-asterisk","versions":[{"version":"< 20.7-cert11","status":"affected"},{"version":">= 22.8-cert1-pre1, < 22.8-cert3","status":"affected"}]}],"references":[{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp","name":"https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8","name":"https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10","name":"https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343","name":"https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3","name":"https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0","name":"https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8","name":"https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac","name":"https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","name":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","name":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","name":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","name":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","name":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","name":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","tags":["x_refsource_MISC"]},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","name":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-26T19:27:35.360Z"},"source":{"advisory":"GHSA-4pgv-j3mr-3rcp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-26T19:44:31.470203Z","id":"CVE-2026-57196","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-26T20:13:49.872Z"}}]}}}