CVE-2026-23738
asterisk - security update
6.1
MEDIUM
CVSS 3.1
EPSS 0.05%
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.
How to fix CVE-2026-23738
To remediate CVE-2026-23738, upgrade the affected package to a fixed version below.
- —upgrade to 1:16.28.0~dfsg-0+deb11u9 or later
- —upgrade to 1:16.28.0~dfsg-0+deb11u9 or later
Is CVE-2026-23738 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1:16.28.0~dfsg-0+deb11u9
- from 0, < 1:16.28.0~dfsg-0+deb11u9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |