Description
In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.
Affected products
libexpat_project: libexpat
References2
- github.com/libexpat/libexpat/pull/1326 Issue TrackingPatch
- github.com/libexpat/libexpat/pull/1329 Issue TrackingPatch
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
- 0% percentile: 21 · as of 10 November 2026
- CWE
- CWE-394
Could this be exploited in your environment?
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