Home/CVE/libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is
CVE

CVE-2025-59375

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

HIGH · CVSS 7.5 EPSS 0.00102
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

1
libexpat project libexpat< 2.7.2
⚠

Public Exploits & PoCs

2
pocgithub.com · 1018github.com
pocissues.oss-fuzz.com · 439133977issues.oss-fuzz.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Sep 2025 · 03:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
rhsaRHSA-2026:21275Critical
suse-csafopenSUSE-SU-2026:20664-1
rhsaRHSA-2026:10950Important
rhsaRHSA-2026:19177Important
rhsaRHSA-2026:19064Important
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74Product
https://github.com/libexpat/libexpat/blob/R_2_7_2/expat/ChangesProduct
https://github.com/libexpat/libexpat/pull/1034Issue Tracking
http://www.openwall.com/lists/oss-security/2025/09/16/2
http://www.openwall.com/lists/oss-security/2026/05/01/5
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
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