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Vulnerability · Published Feb 6, 2026 · Assigned by GitHub_M

CVE-2026-23738The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization

Low 3.5

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 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.5Low
Exploit odds (30 days)0.2%top 91.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14asterisk1:22.8.2+dfsg+~cs6.15.60671435-1DEBIAN-CVE-2026-23738
Ubuntu:22.04:LTSasteriskno fix listedUBUNTU-CVE-2026-23738
Ubuntu:24.04:LTSasteriskno fix listedUBUNTU-CVE-2026-23738
Ubuntu:25.10asteriskno fix listedUBUNTU-CVE-2026-23738
Ubuntu:26.04:LTSasteriskno fix listedUBUNTU-CVE-2026-23738
Ubuntu:26.10asteriskno fix listedUBUNTU-CVE-2026-23738

Affected products (as reported)

VendorProductVersions
asterisk asterisk < 23.2.2< 22.8.2< 21.12.1< 20.18.2< 20.7-cert9

Weakness: CWE-79 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References