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Vulnerability record · CVE-2024-40896 · published 23 December 2024

CVE-2024-40896: Xmlsoft libxml2 xml external entity (xxe) vulnerability

Xmlsoft · Libxml2

In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting "checked"). This makes classic XXE attacks possible.

9.1 CVSS 3.1 Critical EPSS 1.2% · top 32.4% CWE-611 · XML external entity (XXE)
9.1CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting "checked"). This makes classic XXE attacks possible.

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

Affected products

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

References

LinkTags
https://gitlab.gnome.org/GNOME/libxml2/-/commit/1a8932303969907f6572b1b6aac4081c56adb5c6 Issue Tracking
https://gitlab.gnome.org/GNOME/libxml2/-/issues/761 Issue Tracking
https://security.netapp.com/advisory/ntap-20250228-0004/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2024-40896), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.