CVE-2025-59375: CWE-770 Allocation of Resources Without Limits or Throttling in libexpat project libexpat
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
AI Analysis
Technical Summary
The libexpat XML parsing library prior to version 2.7.2 contains a vulnerability (CWE-770) that allows attackers to trigger excessive dynamic memory allocations by submitting crafted small XML documents. This can cause resource exhaustion and denial of service. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity with network attack vector, no privileges required, no user interaction, and high impact on availability. A temporary fix is available, but no full official fix has been confirmed.
Potential Impact
Successful exploitation can lead to denial of service by exhausting system memory resources during XML parsing. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
Mitigation Recommendations
A temporary fix is available for this vulnerability. Users should apply the temporary fix as provided by the libexpat project and monitor vendor advisories for an official patch. Since this is not a cloud service, remediation depends on user action to update or patch the affected libexpat versions.
CVE-2025-59375: CWE-770 Allocation of Resources Without Limits or Throttling in libexpat project libexpat
Description
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libexpat XML parsing library prior to version 2.7.2 contains a vulnerability (CWE-770) that allows attackers to trigger excessive dynamic memory allocations by submitting crafted small XML documents. This can cause resource exhaustion and denial of service. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity with network attack vector, no privileges required, no user interaction, and high impact on availability. A temporary fix is available, but no full official fix has been confirmed.
Potential Impact
Successful exploitation can lead to denial of service by exhausting system memory resources during XML parsing. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
Mitigation Recommendations
A temporary fix is available for this vulnerability. Users should apply the temporary fix as provided by the libexpat project and monitor vendor advisories for an official patch. Since this is not a cloud service, remediation depends on user action to update or patch the affected libexpat versions.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mitre
- Date Reserved
- 2025-09-15T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- temporary-fix
Threat ID: 68c781b639776bc2a148c65c
Added to database: 09/15/2025, 03:02:14 UTC
Last enriched: 05/13/2026, 02:35:59 UTC
Last updated: 07/01/2026, 08:51:18 UTC
Views: 243
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