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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2024-40896

This makes classic XXE attacks possible.

CRITICAL 9.1EPSS 1.22%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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
9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS
1.22% probability · 68th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-611
Affected
xmlsoft/libxml2 · netapp/hci compute node · netapp/solidfire \& hci management node · netapp/solidfire \& hci storage node · netapp/h300s firmware · netapp/h410s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h410c firmware
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 1.22%26 October 202626 October 2026

EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.