CVE-2026-23739
Feb. 6, 2026, 9:57 p.m.
2.0
Low
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, the ast_xml_open() function in xml.c parses XML documents using libxml with unsafe parsing options that enable entity expansion and XInclude processing. Specifically, it invokes xmlReadFile() with the XML_PARSE_NOENT flag and later processes XIncludes via xmlXIncludeProcess().If any untrusted or user-supplied XML file is passed to this function, it can allow an attacker to trigger XML External Entity (XXE) or XInclude-based local file disclosure, potentially exposing sensitive files from the host system. This can also be triggered in other cases in which the user is able to supply input in xml format that triggers the asterisk process to parse it. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Asterisk |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-611
Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | asterisk | asterisk | <20.7-cert9 | / | / | / | / | / | / | / |
| a | asterisk | asterisk | <20.18.2 | / | / | / | / | / | / | / |
| a | asterisk | asterisk | <21.12.1 | / | / | / | / | / | / | / |
| a | asterisk | asterisk | <22.8.2 | / | / | / | / | / | / | / |
| a | asterisk | asterisk | <23.2.2 | / | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: HIGH
- Privileges Required: HIGH
- Scope: UNCHANGED
- Confidentiality Impact: NONE
- Integrity Impact: LOW
- Availability Impact: NONE
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
Timeline
Published: Feb. 6, 2026, 5:16 p.m.
Last Modified: Feb. 6, 2026, 9:57 p.m.
Last Modified: Feb. 6, 2026, 9:57 p.m.
Status : Awaiting Analysis
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.