Low 2.3Published Oct 26, 2026

CVE-2026-57196Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages

Updated under an hour ago (Oct 28, 2026, 11:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for asterisk

Exploited in the last 30 days

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.

CVSS: 2.3 LOW (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

asterisk asterisk asterisk:asterisk (from the name)	before 20.20.1; from 21.0.0-pre1, < 21.12.3; from 22.0.0-pre1, < 22.10.1; from 23.0.0-pre1, < 23.4.1	CNA record
asterisk certified-asterisk asterisk:certified_asterisk (from the name)	before 20.7-cert11; from 22.8-cert1-pre1, < 22.8-cert3	CNA record

References

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
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.