CVE-2026-56406

mediumpriority · track · 0EPSS 0.002 · 7 %ileDEEUFRUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.17% (7th) EPSS

CVSS 6.9 · medium

Is it mine?

16 products

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.

cvss

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

6.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.9mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Lsecondary · ENISA EU

v3.16.9mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Lsecondary · cve@mitre.org USexploitability 1.4 · impact 5.5

v3.16.3mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L/E:Usecondary · CVSS-BT (t0sche)

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
IBM AIX 7.3all versionscert_bundDEcpe:/o:ibm:aix:7.3
IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
IBM VIOS 4.1all versionscert_bundDEcpe:/a:ibm:vios:4.1
OpenBSD OpenBSD 7.8all versionscert_bundDEcpe:/a:openbsd:openbsd:7.8
OpenBSD OpenBSD 7.9all versionscert_bundDEcpe:/a:openbsd:openbsd:7.9
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Meinberg LANTIME< V7.10.013cert_bundDE
Open Source expat< 2.8.2cert_bundDE
libexpat project libexpat0 → 2.8.2enisa_euvdEU
libexpat project libexpat< 2.8.2nvdUScpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2025libexpat: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2026-06-21csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in libexpat ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, darunter möglicherweise die Ausführung von beliebigem Code, die Manipulation von Daten, die Umgehung von Sicherheitsmaßnahmen, die Offenlegung vertraulicher Informationen oder die Herbeiführung eines Denial-of-Service-Zustands.
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
CERTFR-2026-AVI-1390Multiples vulnérabilités dans Tenable Network MonitorFrançais2026-10-27vendor · certfrFR

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 2026-06-21modified 2026-10-25

External citations — patches, advisories, analysis.

scry

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