Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2026-56132

Incorrect Synchronization

Published: Jun 19, 2026 | Modified: Jun 23, 2026
CVSS 3.x
6.9
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS 2.x
RedHat/V2
RedHat/V3
6.9 MODERATE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-56132
CWEhttps://cwe.mitre.org/data/definitions/821.html

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.

Weakness

The product utilizes a shared resource in a concurrent manner, but it does not correctly synchronize access to the resource.

Affected Software

NameVendorStart VersionEnd Version
LibexpatLibexpat_project*2.8.2 (excluding)
Red Hat Enterprise Linux 10RedHatexpat-0:2.7.3-1.el10_2.3*
Red Hat Enterprise Linux 8RedHatexpat-0:2.5.0-2.el8_10.2*
Red Hat Enterprise Linux 9RedHatexpat-0:2.5.0-6.el9_8.3*
Red Hat Enterprise Linux 9RedHatexpat-0:2.5.0-6.el9_8.3*
Red Hat Hardened ImagesRedHatexpat-main-2.8.2-1.hum1*
Red Hat Update Infrastructure 5RedHatrhui5/cds-kubernetes-rhel9:1789479916*
Red Hat Update Infrastructure 5RedHatrhui5/cds-rhel9:1789479900*
Red Hat Update Infrastructure 5RedHatrhui5/haproxy-rhel9:1789479891*
Red Hat Update Infrastructure 5RedHatrhui5/installer-rhel9:1789482961*
Red Hat Update Infrastructure 5RedHatrhui5/rhua-rhel9:1789478095*
CadaverUbuntuquesting*
ExpatUbuntuesm-infra-legacy/trusty*
ExpatUbuntuesm-infra-legacy/xenial*
ExpatUbuntuesm-infra/bionic*
ExpatUbuntuesm-infra/focal*
ExpatUbuntujammy*
ExpatUbuntunoble*
ExpatUbuntuquesting*
ExpatUbunturesolute*
ExpatUbuntuupstream*
MatanzaUbuntudevel*
MatanzaUbuntuesm-apps/focal*
MatanzaUbuntuesm-apps/jammy*
MatanzaUbuntuesm-apps/noble*
MatanzaUbuntuesm-apps/resolute*
MatanzaUbuntujammy*
MatanzaUbuntunoble*
MatanzaUbuntuquesting*
MatanzaUbunturesolute*
Swish-eUbuntuquesting*
TdomUbuntuquesting*
Wbxml2Ubuntuquesting*
Xmlrpc-cUbuntuquesting*

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use