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Vulnerability record · CVE-2022-25236 · published 16 February 2022

CVE-2022-25236: Libexpat project libexpat exposure of resource to wrong sphere vulnerability

LLibexpat Project · Libexpat

xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

9.8 CVSS 3.1 Critical EPSS 36% · top 1.6% CWE-668 · Exposure of resource to wrong sphere
9.8CVSS 3.1 base score, v2 7.5
36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
22References
17 Jun 2026Last modified by NVD

Description

xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/167238/Zoom-XMPP-Stanza-Smuggling-Remote-Code-Execution.html Third Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2022/02/19/1 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Third Party Advisory
https://github.com/libexpat/libexpat/pull/561 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQO
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJG
https://security.gentoo.org/glsa/202209-24 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220303-0008/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5085 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
http://packetstormsecurity.com/files/167238/Zoom-XMPP-Stanza-Smuggling-Remote-Code-Execution.html Third Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2022/02/19/1 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Third Party Advisory
https://github.com/libexpat/libexpat/pull/561 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQO
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJG
https://security.gentoo.org/glsa/202209-24 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220303-0008/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5085 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-25236), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.