CVE-2026-57196

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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."}], "source": {"advisory": "GHSA-4pgv-j3mr-3rcp", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-26T20:13:49.872Z"}}]}}

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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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-26T19:27:35.360Z"}}}, "cveMetadata": {"cveId": "CVE-2026-57196", "state": "PUBLISHED", "dateUpdated": "2026-10-26T20:13:49.872Z", "dateReserved": "2026-06-24T02:00:46.800Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-26T19:27:35.360Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

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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."}], "id": "CVE-2026-57196", "lastModified": "2026-10-27T15:08:50.630", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-57196", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-26T19:44:31.470203Z", "version": "2.0.3"}}]}, "published": "2026-10-26T20:17:57.047", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp"}, {"source": "security-advisories@github.com", "url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "asterisk: asterisk: User impersonation via reflected cross-site scripting in phone provisioning error pages", "id": "2561037", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2561037"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["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.", "A flaw was found in Asterisk. When phone provisioning (res_phoneprov) is enabled, reflected cross-site scripting in HTTP error pages allows an unauthenticated remote attacker to steal an authorized user's Asterisk Manager Interface (AMI) session cookie and impersonate that user. Exploitation requires convincing an authorized user to follow a malicious link when the HTTP server and manager interface are accessible."], "name": "CVE-2026-57196", "public_date": "2026-10-26T19:27:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-57196\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-57196\nhttps://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8\nhttps://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10\nhttps://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343\nhttps://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3\nhttps://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0\nhttps://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8\nhttps://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac\nhttps://github.com/asterisk/asterisk/releases/tag/20.20.1\nhttps://github.com/asterisk/asterisk/releases/tag/21.12.3\nhttps://github.com/asterisk/asterisk/releases/tag/22.10.1\nhttps://github.com/asterisk/asterisk/releases/tag/23.4.1\nhttps://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11\nhttps://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3\nhttps://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp\nhttps://github.com/asterisk/asterisk/tree/24.0.0-pre1"], "statement": "Red Hat has evaluated this vulnerability as having a Moderate severity because successful exploitation relies on significant non-default configurations and user interaction. To trigger the vulnerability, administrators must explicitly enable the embedded HTTP service, phone provisioning (`res_phoneprov`), and HTTP access for the Asterisk Manager Interface (AMI), which are all disabled by default. Additionally, an external attacker must persuade an authenticated user to access a crafted link to hijack their administrative session.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,20.20.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[21.0.0-pre1,21.12.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[22.0.0-pre1,22.10.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[23.0.0-pre1,23.4.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "asterisk", "source": "cna", "vendor": "asterisk"}, "product": "asterisk", "vendor": "asterisk"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,20.7-cert11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[22.8-cert1-pre1,22.8-cert3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "certified-asterisk", "source": "cna", "vendor": "asterisk"}, "product": "certified_asterisk", "vendor": "asterisk"}], "created": "2026-10-26T20:30:15.337149+00:00", "updated": "2026-10-26T23:00:19.660019+00:00", "vendors": ["asterisk", "asterisk$PRODUCT$asterisk", "asterisk$PRODUCT$certified_asterisk"]}