CVE-2026-56132

mediumpriority · track · 28EPSS 0.001 · 3 %ileDEEUFRUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.14% (3rd) EPSS

CVSS 6.9 · medium

Is it mine?

16 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

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:Lprimary · NVD / NIST USexploitability 1.4 · impact 5.5

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)

ssvc

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-821US

affected products (16)

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:*:*:*:*:*:*:*:*

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2008expat: Mehrere SchwachstellenDeutsch2026-06-18csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in expat ausnutzen, um einen Denial of Service Angriff durchzuführen oder potentiell Code auszuführen.
CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
CERTFR-2026-AVI-1390Multiples vulnérabilités dans Tenable Network MonitorFrançais2026-10-27vendor · certfrFR

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd certfr NVD CVE.org MITRE

published 2026-06-19modified 2026-10-26

references (3)

External citations — patches, advisories, analysis.

scry

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