Medium severity · published Feb 6, 2026
CVE-2026-23738
The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
asterisk · asterisk
< 23.2.2; < 22.8.2; < 21.12.1; < 20.18.2; < 20.7-cert9 · source: vendor, NVD
CA
Certified Asterisk · Sangoma
through 18.9; 20.7; 20.7; 20.7; 20.7; 20.7; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23738
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23738
Vendor Advisory
https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh
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