CVE-2026-23738
published 2026-02-06CVE-2026-23738: 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…
PriorityP430medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.16%
5.6th percentile
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
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| asterisk | asterisk | < 23.2.2 | 23.2.2 |
| asterisk | asterisk | < 22.8.2 | 22.8.2 |
| asterisk | asterisk | < 21.12.1 | 21.12.1 |
| asterisk | asterisk | < 20.18.2 | 20.18.2 |
| asterisk | asterisk | < 20.7-cert9 | 20.7-cert9 |
| asterisk | asterisk | >= 0 < 1:16.28.0~dfsg-0+deb11u9 | 1:16.28.0~dfsg-0+deb11u9 |
| debian | asterisk | < asterisk 1:16.28.0~dfsg-0+deb11u9 (bullseye) | asterisk 1:16.28.0~dfsg-0+deb11u9 (bullseye) |
| sangoma | asterisk | <= 20.18.2 | — |
| sangoma | asterisk | 21.0.0 – 21.12.1 | — |
| sangoma | asterisk | 22.0.0 – 22.8.2 | — |
| sangoma | asterisk | >= 23.0.0 < 23.2.2 | 23.2.2 |
| sangoma | certified_asterisk | <= 18.9 | — |
| sangoma | certified_asterisk | — | — |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
osv6.1MEDIUM
vendor_debian3.5LOW
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Debian
CVE-2026-23738: asterisk - Asterisk is an open source private branch exchange and telephony toolkit. Prior ...
vendor_debian·2026·CVSS 3.5
CVE-2026-23738 [LOW] CVE-2026-23738: asterisk - Asterisk is an open source private branch exchange and telephony toolkit. Prior ...
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.
Scope: local
bullseye: resolved (fixed in 1:16.28.0~dfsg-0+deb11u9)
sid: resolved (fixed in 1:22.8.2+dfsg+~cs6.15.60671435-1)
OSV
CVE-2026-23738: Asterisk is an open source private branch exchange and telephony toolkit
osv·2026-02-06·CVSS 6.1
CVE-2026-23738 [MEDIUM] CVE-2026-23738: Asterisk is an open source private branch exchange and telephony toolkit
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-23738 asterisk: embedded /httpstatus page echos user supplied values without sanitization [fedora-42]
bugzilla·2026-02-09·CVSS 6.1
CVE-2026-23738 [MEDIUM] CVE-2026-23738 asterisk: embedded /httpstatus page echos user supplied values without sanitization [fedora-42]
CVE-2026-23738 asterisk: embedded /httpstatus page echos user supplied values without sanitization [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently mainta
Wiz
CVE-2026-23738 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 3.5
CVE-2026-23738 [LOW] CVE-2026-23738 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23738 :
NixOS vulnerability analysis and mitigation
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.
Source : NVD
## 6.1
Score
Published February 6, 2026
Severity MEDIUM
CNA Score 3.5
Affected Technologies
NixOS
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation
2026-02-06
Published