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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
asterisk asterisk affected
Version Status Constraints
< 20.20.1 affected —
>= 21.0.0-pre1, < 21.12.3 affected —
>= 22.0.0-pre1, < 22.10.1 affected —
>= 23.0.0-pre1, < 23.4.1 affected —
asterisk certified-asterisk affected
Version Status Constraints
< 20.7-cert11 affected —
>= 22.8-cert1-pre1, < 22.8-cert3 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Asterisk Subscribe
Asterisk Subscribe
Certified Asterisk Subscribe

Project Subscriptions

Vendors Products
Asterisk Subscribe
Asterisk Subscribe
Certified Asterisk Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8 cve-icon cve-icon
https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/20.20.1 cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/21.12.3 cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/22.10.1 cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/23.4.1 cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 cve-icon cve-icon
https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 cve-icon cve-icon
https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp cve-icon cve-icon
https://github.com/asterisk/asterisk/tree/24.0.0-pre1 cve-icon cve-icon
History

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Asterisk
Asterisk asterisk
Asterisk certified Asterisk
Vendors & Products Asterisk
Asterisk asterisk
Asterisk certified Asterisk

Mon, 26 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 26 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 2.3, '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-26T20:13:49.872Z

Reserved: 2026-06-24T02:00:46.800Z

Link: CVE-2026-57196

cve-icon Vulnrichment

Updated: 2026-10-26T20:13:44.934Z

cve-icon NVD

Status : Received

Published: 2026-10-26T20:17:57.047

Modified: 2026-10-26T21:18:31.447

Link: CVE-2026-57196

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T23:00:19Z

Weaknesses