CVE-2026-23739

mediumpriority · track · 26EPSS 0.002 · 11 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.21% (11th) EPSS
CVSS 6.5 · medium
Is it mine?
22 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2–6.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6
v3.12lowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU
v3.12lowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comexploitability 0.5 · impact 1.4
v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-611US
04

affected products (22)

Products and version ranges known to be affected.

showing 20 of 22
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-0327Asterisk: Mehrere SchwachstellenDeutsch2026-02-05csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Asterisk ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen, beliebigen Code mit Root-Rechten auszuführen, erweiterte Privilegien zu erlangen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.

06

also known as (2)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundnvdNVDCVE.orgMITRE
published 2026-02-06modified 2026-06-17
08

references (6)

External citations — patches, advisories, analysis.

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