CVE-2026-23738 Details
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.
A cross-site scripting vulnerability has been identified in Asterisk, an open-source private branch exchange and telephony toolkit. This issue affects versions through 23.2.1, 22.8.1, 21.12.0, 20.18.1, and 20.7-cert8. The vulnerability arises because user-supplied values from cookies and GET query parameters are directly inserted into the HTML of the '/httpstatus' page without proper sanitization. This unsanitized interpolation, facilitated by the 'ast_str_append' function, creates an opportunity for cross-site scripting attacks, as well as the potential to exploit other vulnerabilities related to credential or token theft and cross-site request forgery.
Users can upgrade to Asterisk versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, or 23.2.2 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sangoma asterisk | <= 20.18.2 >= 21.0.0, <= 21.12.1 >= 22.0.0, <= 22.8.2 >= 23.0.0, < 23.2.2 |
CPE
Remediation
| |
| sangoma certified asterisk | <= 18.9 20.7 cert1 20.7 cert1-rc1 20.7 cert1-rc2 20.7 cert2 20.7 cert3 20.7 cert4 20.7 cert5 20.7 cert6 20.7 cert7 20.7 cert8 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 6, 2026 | New CVE Received | [email protected] |