CVE-2026-23739 describes an XML External Entity (XXE) and XInclude vulnerability in Asterisk, an open-source telephony toolkit, affecting versions prior to 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2. The vulnerability arises from unsafe XML parsing options in the ast_xml_open() function, allowing an attacker to disclose local files by supplying untrusted XML input. With a CVSS score of 6.5 (Medium), this vulnerability has a network attack vector and low complexity, potentially leading to high confidentiality impact without requiring user interaction. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 20.18.2CPE matchmatch criteria | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* | ||
>= 21.0.0, < 21.12.1CPE matchmatch criteria | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* | ||
>= 22.0.0, < 22.8.2CPE matchmatch criteria | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* | ||
>= 23.0.0, < 23.2.2CPE matchmatch criteria | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* | ||
<= 18.9CPE matchmatch criteria | cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
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