CVE catalog

CVE-2026-117610

expat: CVE-2026-117610

Severity: High · CVSS 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 28, 2026, 3:17:00 AM UTC
Source: [NVD] · [CVE record]

libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	expat	sid	`2.9.0-1`	vulnerable
Debian	expat	forky	`2.9.0-1`	vulnerable
Debian	expat	trixie	`2.8.3-1~deb13u1`	vulnerable
Debian	expat	trixie-security	`2.9.0-1~deb13u1`	vulnerable
Debian	expat	bookworm	`2.5.0-1+deb12u2`	vulnerable
Debian	expat	bookworm-security	`2.5.0-1+deb12u5`	vulnerable
Ubuntu	coin3	pro	`3.1.4~abc9f50+dfsg1-2`	vulnerable
Ubuntu	coin3	pro	`3.1.4~abc9f50+dfsg2-1`	vulnerable
Ubuntu	coin3	pro	`3.1.4~abc9f50+dfsg3-1`	vulnerable
Ubuntu	coin3	pro	`3.1.4~abc9f50+dfsg3-2`	vulnerable
Ubuntu	coin3	pro	`3.1.4~abc9f50+dfsg3-2ubuntu0.1~esm1`	vulnerable
Ubuntu	expat	pro	`2.2.7-2`	vulnerable
Ubuntu	expat	pro	`2.2.9-1`	vulnerable
Ubuntu	expat	pro	`2.2.9-1build1`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.2`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.4`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.5`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.6`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.7`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.8`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.8+esm1`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.8+esm2`	vulnerable
Ubuntu	expat	pro	`2.2.9-1ubuntu0.8+esm3`	vulnerable
Ubuntu	vnc4	pro	`4.1.1+xorg4.3.0-37.3ubuntu2`	vulnerable
Ubuntu	vnc4	pro	`4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1`	vulnerable
Ubuntu	vtk	pro	`5.10.1+dfsg-2`	vulnerable
Ubuntu	vtk	pro	`5.10.1+dfsg-2build3`	vulnerable
Ubuntu	vtk	pro	`5.10.1+dfsg-2.1build1`	vulnerable
Ubuntu	vtk	pro	`5.10.1+dfsg-2.1ubuntu0.1~esm1`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-11`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-11.1`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-12`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-12build1`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-12build2`	vulnerable
Ubuntu	xmlrpc-c	pro	`1.33.14-12ubuntu0.1~esm1`	vulnerable
Ubuntu	ayttm	pro	`0.6.3-3build1`	vulnerable
Ubuntu	ayttm	pro	`0.6.3-3ubuntu0.1~esm1`	vulnerable
Ubuntu	cableswig	pro	`0.1.0+git20150808-1`	vulnerable
Ubuntu	cableswig	pro	`0.1.0+git20150808-2`	vulnerable
Ubuntu	cableswig	pro	`0.1.0+git20150808-2ubuntu0.1~esm1`	vulnerable
Ubuntu	cadaver	16.04	`0.23.3-2ubuntu2`	vulnerable
Ubuntu	gdcm	16.04	`2.4.4-4`	vulnerable
Ubuntu	gdcm	16.04	`2.4.4-4build1`	vulnerable
Ubuntu	gdcm	16.04	`2.4.4-4ubuntu1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.1-3`	vulnerable
Ubuntu	gdcm	16.04	`2.6.2-1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.2-2`	vulnerable
Ubuntu	gdcm	16.04	`2.6.2-3`	vulnerable
Ubuntu	gdcm	16.04	`2.6.3-1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.3-1ubuntu1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.3-2ubuntu1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.3-3ubuntu1`	vulnerable
Ubuntu	gdcm	16.04	`2.6.3-3ubuntu3`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.8.1-1ubuntu3`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.8.1-1ubuntu4`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.8.2-3.1ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.9.0-3ubuntu2`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.9.0-4ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	16.04	`4.9.0-4ubuntu1.1`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4ubuntu1`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu1`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2.24.0.4.1+esm1`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2.24.0.4.1+esm2`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2.24.0.4.1+esm3`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2.24.0.4.1+esm4`	vulnerable
Ubuntu	libxmltok	pro	`1.2-4.1ubuntu2.24.0.4.1+esm5`	vulnerable
Ubuntu	matanza	16.04	`0.13+ds1-5`	vulnerable
Ubuntu	smart	16.04	`1.4-2`	vulnerable
Ubuntu	swish-e	pro	`2.4.7-7`	vulnerable
Ubuntu	swish-e	pro	`2.4.7-7.1`	vulnerable
Ubuntu	swish-e	pro	`2.4.7-7.1ubuntu0.1~esm1`	vulnerable
Ubuntu	tdom	16.04	`0.8.3-1`	vulnerable
Ubuntu	wbxml2	16.04	`0.10.7-1`	vulnerable
Ubuntu	cadaver	18.04	`0.23.3-2ubuntu3`	vulnerable
Ubuntu	gdcm	18.04	`2.8.2-3build1`	vulnerable
Ubuntu	gdcm	18.04	`2.8.3-1`	vulnerable
Ubuntu	gdcm	18.04	`2.8.4-1`	vulnerable
Ubuntu	gdcm	18.04	`2.8.4-1build2`	vulnerable
Ubuntu	insighttoolkit4	18.04	`4.12.2-dfsg1-1ubuntu1`	vulnerable
Ubuntu	matanza	18.04	`0.13+ds1-5build1`	vulnerable
Ubuntu	matanza	18.04	`0.13+ds1-6`	vulnerable
Ubuntu	smart	18.04	`1.4-2`	vulnerable
Ubuntu	tdom	18.04	`0.8.3-1`	vulnerable
Ubuntu	tdom	18.04	`0.9.0-1`	vulnerable
Ubuntu	vnc4	18.04	`4.1.1+xorg4.3.0-37.3ubuntu2`	vulnerable
Ubuntu	wbxml2	18.04	`0.10.7-1`	vulnerable
Ubuntu	wbxml2	18.04	`0.10.7-1build1`	vulnerable
Ubuntu	cadaver	20.04	`0.23.3-2.1build1`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.12.2-dfsg1-4.1ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.13.2-dfsg1-1ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.13.2-dfsg1-4ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.13.2-dfsg1-6`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.13.2-dfsg1-6ubuntu1`	vulnerable
Ubuntu	insighttoolkit4	20.04	`4.13.2-dfsg1-8`	vulnerable
Ubuntu	matanza	20.04	`0.13+ds1-6`	vulnerable
Ubuntu	matanza	20.04	`0.13+ds2-1`	vulnerable
Ubuntu	tdom	20.04	`0.9.1-1`	vulnerable
Ubuntu	wbxml2	20.04	`0.10.7-1build1`	vulnerable
Ubuntu	cadaver	22.04	`0.23.3-2.1build1`	vulnerable
Ubuntu	expat	22.04	`2.4.1-2`	vulnerable
Ubuntu	expat	22.04	`2.4.1-3`	vulnerable
Ubuntu	expat	22.04	`2.4.2-1`	vulnerable
Ubuntu	expat	22.04	`2.4.3-1`	vulnerable
Ubuntu	expat	22.04	`2.4.3-2`	vulnerable
Ubuntu	expat	22.04	`2.4.4-1`	vulnerable
Ubuntu	expat	22.04	`2.4.6-1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.2`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.3`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.4`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.5`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.6`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.7`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.8`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.9`	vulnerable
Ubuntu	insighttoolkit4	22.04	`4.13.3withdata-dfsg1-4.1`	vulnerable
Ubuntu	insighttoolkit4	22.04	`4.13.3withdata-dfsg2-1ubuntu1`	vulnerable
Ubuntu	matanza	22.04	`0.13+ds2-1`	vulnerable
Ubuntu	tdom	22.04	`0.9.2-1`	vulnerable
Ubuntu	wbxml2	22.04	`0.10.7-1build1`	vulnerable
Ubuntu	wbxml2	22.04	`0.11.7+dfsg-1`	vulnerable
Ubuntu	cadaver	24.04	`0.24+dfsg-2`	vulnerable
Ubuntu	cadaver	24.04	`0.24+dfsg-3`	vulnerable
Ubuntu	cadaver	24.04	`0.24+dfsg-3build1`	vulnerable
Ubuntu	cadaver	24.04	`0.24+dfsg-3build2`	vulnerable
Ubuntu	expat	24.04	`2.5.0-2`	vulnerable
Ubuntu	expat	24.04	`2.6.0-1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2build1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.2`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.3`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.4`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.5`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.6`	vulnerable
Ubuntu	matanza	24.04	`0.13+ds2-1`	vulnerable
Ubuntu	matanza	24.04	`0.13+ds2-1build1`	vulnerable
Ubuntu	matanza	24.04	`0.13+ds2-1build2`	vulnerable
Ubuntu	tdom	24.04	`0.9.3-1`	vulnerable
Ubuntu	tdom	24.04	`0.9.3-1build1`	vulnerable
Ubuntu	wbxml2	24.04	`0.11.8+dfsg-3`	vulnerable
Ubuntu	wbxml2	24.04	`0.11.8+dfsg-3build1`	vulnerable
Ubuntu	cadaver	26.10	`0.28+dfsg-2`	vulnerable
Ubuntu	expat	26.10	`2.7.4-1`	vulnerable
Ubuntu	expat	26.10	`2.8.1-1`	vulnerable
Ubuntu	expat	26.10	`2.8.2-1`	vulnerable
Ubuntu	expat	26.10	`2.8.3-1`	vulnerable
Ubuntu	expat	26.10	`2.8.3-1ubuntu1`	vulnerable
Ubuntu	matanza	26.10	`0.13+ds2-2build1`	vulnerable
Ubuntu	swish-e	26.10	`2.4.7-7.1`	vulnerable
Ubuntu	swish-e	26.10	`2.4.7-7.2`	vulnerable
Ubuntu	swish-e	26.10	`2.4.7-7.2build1`	vulnerable
Ubuntu	tdom	26.10	`0.9.6-2`	vulnerable
Ubuntu	tdom	26.10	`0.9.6-3`	vulnerable
Ubuntu	wbxml2	26.10	`0.11.10+dfsg-3`	vulnerable
Ubuntu	wbxml2	26.10	`0.11.10+dfsg-4`	vulnerable
Ubuntu	xmlrpc-c	26.10	`1.60.05-1`	vulnerable
Ubuntu	xmlrpc-c	26.10	`1.60.05-1build1`	vulnerable
Ubuntu	cadaver	26.04	`0.26+dfsg-2`	vulnerable
Ubuntu	cadaver	26.04	`0.28+dfsg-1`	vulnerable
Ubuntu	cadaver	26.04	`0.28+dfsg-2`	vulnerable
Ubuntu	expat	26.04	`2.7.1-2`	vulnerable
Ubuntu	expat	26.04	`2.7.3-1`	vulnerable
Ubuntu	expat	26.04	`2.7.4-1`	vulnerable
Ubuntu	expat	26.04	`2.7.4-1ubuntu0.1`	vulnerable
Ubuntu	expat	26.04	`2.7.4-1ubuntu0.2`	vulnerable
Ubuntu	matanza	26.04	`0.13+ds2-2`	vulnerable
Ubuntu	matanza	26.04	`0.13+ds2-2build1`	vulnerable
Ubuntu	tdom	26.04	`0.9.5.1-3`	vulnerable
Ubuntu	tdom	26.04	`0.9.6-2`	vulnerable
Ubuntu	wbxml2	26.04	`0.11.10+dfsg-2`	vulnerable
Ubuntu	wbxml2	26.04	`0.11.10+dfsg-2build1`	vulnerable
Ubuntu	wbxml2	26.04	`0.11.10+dfsg-3`	vulnerable
Ubuntu	xmlrpc-c	26.04	`1.59.03-10.1`	vulnerable
Ubuntu	xmlrpc-c	26.04	`1.60.05-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	expat	source	sid	`(unfixed)`	not yet assigned	Not reported	[1152343]
Debian	expat	source	forky	`(unfixed)`	not yet assigned	Not reported	[1152343]
Debian	expat	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1152343]
Debian	expat	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1152343]

[Debian bug #1152343]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[expat]Affected
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
[libexpat1]Affected
Source package: [expat]
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
[libexpat1-dev]Affected
Source package: [expat]
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Affected
  dsa · expat · debian · bookworm; dsa · expat · debian · 12

[Debian 13 (Trixie)]

[expat]Affected
Details (6)
- 2.7.1-2 · amd64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Affected
  dsa · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Affected
  dsa · expat · debian · 13
[libexpat1]Affected
Source package: [expat]
Details (6)
- 2.7.1-2 · amd64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Affected
  dsa · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Affected
  dsa · expat · debian · 13
[libexpat1-dev]Affected
Source package: [expat]
Details (6)
- 2.7.1-2 · amd64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Affected
  dsa · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Affected
  dsa · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Affected
  dsa · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Affected
  dsa · expat · debian · 13

Observed: Oct 28, 2026, 9:32:07 PM UTC

References

[Debian Security Tracker] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]