Resource exhaustion in Libexpat Project
CVE-2025-59375
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.014 (72.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.014 · change: +0.001
Affected products
- Libexpat Project — versions 0
- Libexpat Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libexpat/libexpat/issues/1018 (Exploit, Issue Tracking)
- github.com/libexpat/libexpat/pull/1034 (Issue Tracking)
- github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expa… (Product)
- issues.oss-fuzz.com/issues/439133977 (Exploit, Issue Tracking)
- github.com/libexpat/libexpat/blob/R_2_7_2/expat/Changes (Product)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2025-59375?
- CVE-2025-59375 is a high-severity vulnerability in Libexpat Project, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-09-15.
- How severe is CVE-2025-59375?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-59375 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.