Vulnerability · Published Oct 26, 2026 · Assigned by GitHub_M
CVE-2026-57196Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages
Low 2.3
In plain English
A low-severity cross-site scripting in asterisk from asterisk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | asterisk | 1:22.10.1+dfsg+~cs6.17.60671434-1 | DEBIAN-CVE-2026-57196 |
| Ubuntu:22.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57196 |
| Ubuntu:24.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57196 |
| Ubuntu:26.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57196 |
| Ubuntu:26.10 | asterisk | no fix listed | UBUNTU-CVE-2026-57196 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| asterisk | asterisk | < 20.20.1>= 21.0.0-pre1, < 21.12.3>= 22.0.0-pre1, < 22.10.1>= 23.0.0-pre1, < 23.4.1 |
| asterisk | certified-asterisk | < 20.7-cert11>= 22.8-cert1-pre1, < 22.8-cert3 |
Weakness: CWE-79 · 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
References
- https://github.com/asterisk/asterisk/security/advisories/GHSA-4pgv-j3mr-3rcp x_refsource_CONFIRM
- https://github.com/asterisk/asterisk/commit/4373f8174bf71c467fc9db96036126d30425b9e8 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/4b360a61d649a7c12b1021aa554642322ee28c10 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/60c23d8b56b2cf93caceb527e07654b16f388343 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/87399593cda601ae3670bf890bdb32f78e881bf3 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/9cff8e62fbd9e7db87c233de3335047df88877d0 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/dc43c5b32a3a216da4c9e95388fbadaca3e78bc8 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/e6998409f73f49959d0062c695bb9a2f611af5ac x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/20.20.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/21.12.3 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/22.10.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/23.4.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 x_refsource_MISC
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1 x_refsource_MISC