p PatchFirst

CVE-2026-118370

CVE-2026-118370 · libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

libexpat through 2.9.0 contains a signed integer overflow vulnerability in storeAtts() in lib/xmlparse.c that allows attackers to trigger out-of-bounds writes via oversized attribute counts. Attackers can supply a multi-gigabyte document with a start tag carrying over 2^30 attributes to overflow attIndex and nPrefixes, crashing applications or corrupting heap memory.

CVSS 8.2 · High · EPSS 0.4%

Published
Updated

Stack: system

Affected products and versions

  • libexpat

    Versions
    • ≥ 0, ≤ 2.9.0: Affected (semver)

    No fix published

  • expat Debian:12

    Versions
    • 2.5.0-1
    • 2.5.0-1+deb12u1
    • 2.5.0-1+deb12u2
    • 2.5.0-1+deb12u3
    • 2.5.0-1+deb12u4
    • 2.5.0-1+deb12u5
    • 2.5.0-2
    • 2.6.0-1
    • 2.6.1-1
    • 2.6.1-2
    • 2.6.2-1
    • 2.6.2-2
    • 2.6.3-1
    • 2.6.3-2
    • 2.6.4-1
    • 2.7.0-1
    • 2.7.1-1
    • 2.7.1-2
    • 2.7.2-1
    • 2.7.3-1
    • 2.7.3-2
    • 2.7.4-1
    • 2.7.5-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.1-1
    • 2.8.2-1
    • 2.8.2-1~deb13u1
    • 2.8.3-1
    • 2.8.3-1~deb13u1
    • 2.8.4-1
    • 2.8.4-2
    • 2.8.5-1
    • 2.8.5-2
    • 2.9.0-1
    • 2.9.0-1~deb13u1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • expat Debian:13

    Versions
    • 2.7.1-2
    • 2.7.2-1
    • 2.7.3-1
    • 2.7.3-2
    • 2.7.4-1
    • 2.7.5-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.1-1
    • 2.8.2-1
    • 2.8.2-1~deb13u1
    • 2.8.3-1
    • 2.8.3-1~deb13u1
    • 2.8.4-1
    • 2.8.4-2
    • 2.8.5-1
    • 2.8.5-2
    • 2.9.0-1
    • 2.9.0-1~deb13u1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • expat Debian:14

    Versions
    • 2.7.1-2
    • 2.7.2-1
    • 2.7.3-1
    • 2.7.3-2
    • 2.7.4-1
    • 2.7.5-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.1-1
    • 2.8.2-1
    • 2.8.2-1~deb13u1
    • 2.8.3-1
    • 2.8.3-1~deb13u1
    • 2.8.4-1
    • 2.8.4-2
    • 2.8.5-1
    • 2.8.5-2
    • 2.9.0-1
    • 2.9.0-1~deb13u1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • coin3 Ubuntu:Pro:14.04:LTS

    Versions
    • 3.1.4~abc9f50-3
    • 3.1.4~abc9f50-4
    • 3.1.4~abc9f50-4ubuntu2
    • 3.1.4~abc9f50-4ubuntu2+esm1
    • 3.1.4~abc9f50-4ubuntu2+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • expat Ubuntu:Pro:14.04:LTS

    Versions
    • 2.1.0-4
    • 2.1.0-4ubuntu1
    • 2.1.0-4ubuntu1.1
    • 2.1.0-4ubuntu1.2
    • 2.1.0-4ubuntu1.3
    • 2.1.0-4ubuntu1.4
    • 2.1.0-4ubuntu1.4+esm1
    • 2.1.0-4ubuntu1.4+esm2
    • 2.1.0-4ubuntu1.4+esm4
    • 2.1.0-4ubuntu1.4+esm6
    • 2.1.0-4ubuntu1.4+esm7
    • 2.1.0-4ubuntu1.4+esm8
    • 2.1.0-4ubuntu1.4+esm9
    • 2.1.0-4ubuntu1.4+esm10
    • 2.1.0-4ubuntu1.4+esm11
    • 2.1.0-4ubuntu1.4+esm12
    • 2.1.0-4ubuntu1.4+esm13
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • vnc4 Ubuntu:Pro:14.04:LTS

    Versions
    • 4.1.1+xorg4.3.0-37ubuntu5
    • 4.1.1+xorg4.3.0-37ubuntu5.0.1
    • 4.1.1+xorg4.3.0-37ubuntu5.0.2
    • 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • vtk Ubuntu:Pro:14.04:LTS

    Versions
    • 5.8.0-14ubuntu1
    • 5.8.0-14ubuntu3
    • 5.8.0-14.1ubuntu2
    • 5.8.0-14.1ubuntu3
    • 5.8.0-14.1ubuntu3+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • xmlrpc-c Ubuntu:Pro:14.04:LTS

    Versions
    • 1.16.33-3.2ubuntu3
    • 1.33.06-0ubuntu1
    • 1.33.06-0ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • expat Ubuntu:Pro:16.04:LTS

    Versions
    • 2.1.0-7
    • 2.1.0-7ubuntu0.16.04.1
    • 2.1.0-7ubuntu0.16.04.2
    • 2.1.0-7ubuntu0.16.04.3
    • 2.1.0-7ubuntu0.16.04.4
    • 2.1.0-7ubuntu0.16.04.5
    • 2.1.0-7ubuntu0.16.04.5+esm2
    • 2.1.0-7ubuntu0.16.04.5+esm5
    • 2.1.0-7ubuntu0.16.04.5+esm6
    • 2.1.0-7ubuntu0.16.04.5+esm7
    • 2.1.0-7ubuntu0.16.04.5+esm8
    • 2.1.0-7ubuntu0.16.04.5+esm9
    • 2.1.0-7ubuntu0.16.04.5+esm10
    • 2.1.0-7ubuntu0.16.04.5+esm11
    • 2.1.0-7ubuntu0.16.04.5+esm12
    • 2.1.0-7ubuntu0.16.04.5+esm13
    • 2.1.0-7ubuntu0.16.04.5+esm14
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ayttm Ubuntu:Pro:16.04:LTS

    Versions
    • 0.6.3-3build1
    • 0.6.3-3ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cableswig Ubuntu:Pro:16.04:LTS

    Versions
    • 0.1.0+git20150808-1
    • 0.1.0+git20150808-2
    • 0.1.0+git20150808-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cadaver Ubuntu:16.04:LTS

    Versions
    • 0.23.3-2ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • coin3 Ubuntu:Pro:16.04:LTS

    Versions
    • 3.1.4~abc9f50+dfsg1-1
    • 3.1.4~abc9f50+dfsg1-1ubuntu0.1~esm1
    • 3.1.4~abc9f50+dfsg1-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gdcm Ubuntu:16.04:LTS

    Versions
    • 2.4.4-4
    • 2.4.4-4build1
    • 2.4.4-4ubuntu1
    • 2.6.1-3
    • 2.6.2-1
    • 2.6.2-2
    • 2.6.2-3
    • 2.6.3-1
    • 2.6.3-1ubuntu1
    • 2.6.3-2ubuntu1
    • 2.6.3-3ubuntu1
    • 2.6.3-3ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • insighttoolkit4 Ubuntu:16.04:LTS

    Versions
    • 4.8.1-1ubuntu3
    • 4.8.1-1ubuntu4
    • 4.8.2-3.1ubuntu1
    • 4.9.0-3ubuntu2
    • 4.9.0-4ubuntu1
    • 4.9.0-4ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libxmltok Ubuntu:Pro:16.04:LTS

    Versions
    • 1.2-3build3
    • 1.2-3ubuntu0.1~esm1
    • 1.2-3ubuntu0.16.04.1~esm1
    • 1.2-3ubuntu0.16.04.1~esm2
    • 1.2-3ubuntu0.16.04.1~esm3
    • 1.2-3ubuntu0.16.04.1~esm4
    • 1.2-3ubuntu0.16.04.1~esm5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • matanza Ubuntu:16.04:LTS

    Versions
    • 0.13+ds1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • smart Ubuntu:16.04:LTS

    Versions
    • 1.4-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • swish-e Ubuntu:Pro:16.04:LTS

    Versions
    • 2.4.7-4
    • 2.4.7-4build1
    • 2.4.7-4ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • tdom Ubuntu:16.04:LTS

    Versions
    • 0.8.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • vnc4 Ubuntu:Pro:16.04:LTS

    Versions
    • 4.1.1+xorg4.3.0-37.3ubuntu2
    • 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • vtk Ubuntu:Pro:16.04:LTS

    Versions
    • 5.10.1+dfsg-2
    • 5.10.1+dfsg-2build3
    • 5.10.1+dfsg-2.1build1
    • 5.10.1+dfsg-2.1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wbxml2 Ubuntu:16.04:LTS

    Versions
    • 0.10.7-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →