What is CVE-2026-23738?

CVE-2026-23738 is a low-severity vulnerability in Asterisk, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-02-06.

How severe is CVE-2026-23738?

Low severity. CVSS v3 base score is 3.5 out of 10.

XSS in Asterisk

CVE-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 supplied/control values for Cookies and any GET variable query Parameter are directly interp…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Asterisk — versions < 23.2.2, < 22.8.2, < 21.12.1
Sangoma Asterisk
Sangoma Certified_asterisk — versions 20.7

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-23738?: CVE-2026-23738 is a low-severity vulnerability in Asterisk, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-02-06.
How severe is CVE-2026-23738?: Low severity. CVSS v3 base score is 3.5 out of 10.