Asterisk is an open source private branch exchange and telephony toolkit.
CVE-2026-57196
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 resphoneprov 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.
Assessment
- CVSS
- 2.3 (v4.0)
- Severity
- Low
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 26 October 2026
- Last updated
- 27 October 2026
- Weakness
- CWE-79
- Assigner
- security-advisories@github.com
CVSS vectorCVSS: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
At the source
References
- 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
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