Description
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
Affected products
libexpat_project: libexpat
References10
- github.com/libexpat/libexpat/pull/789 ExploitVendor Advisory
- github.com/libexpat/libexpat/pull/789 ExploitVendor Advisory
- www.openwall.com/lists/oss-security/2024/03/20/5
- lists.debian.org/debian-lts-announce/2024/04/msg00006.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.…
- lists.fedoraproject.org/archives/list/package-announce%40lists.…
- security.netapp.com/advisory/ntap-20240614-0003/
- www.openwall.com/lists/oss-security/2024/03/20/5
- lists.debian.org/debian-lts-announce/2024/04/msg00006.html
- lists.debian.org/debian-lts-announce/2024/09/msg00036.html
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 2% percentile: 82 · as of 5 November 2026
- CWE
- CWE-400
Could this be exploited in your environment?
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