CVE-2025-66382: CWE-407 Inefficient Algorithmic Complexity in libexpat project libexpat
In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.
AI Analysis
Technical Summary
This vulnerability in libexpat (up to version 2.7.3) involves inefficient algorithmic complexity (CWE-407) where processing a crafted input file approximately 2 MiB in size causes the library to consume excessive processing time, leading to a potential denial of service. The CVSS v3.1 base score is 2.9, with attack vector local, high attack complexity, no privileges required, no user interaction, unchanged scope, and impact limited to availability (low impact). No patch or remediation information is provided, and no known exploits are reported.
Potential Impact
The impact is limited to availability degradation due to prolonged processing time when handling a crafted input file. There is no confidentiality or integrity impact. The attack requires local access and has high complexity, reducing the likelihood of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or workaround is currently documented, users should monitor vendor communications for updates. Given the local attack vector and high complexity, immediate urgent action is not indicated.
CVE-2025-66382: CWE-407 Inefficient Algorithmic Complexity in libexpat project libexpat
Description
In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.
CVSS v3.1
Score 2.9low
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in libexpat (up to version 2.7.3) involves inefficient algorithmic complexity (CWE-407) where processing a crafted input file approximately 2 MiB in size causes the library to consume excessive processing time, leading to a potential denial of service. The CVSS v3.1 base score is 2.9, with attack vector local, high attack complexity, no privileges required, no user interaction, unchanged scope, and impact limited to availability (low impact). No patch or remediation information is provided, and no known exploits are reported.
Potential Impact
The impact is limited to availability degradation due to prolonged processing time when handling a crafted input file. There is no confidentiality or integrity impact. The attack requires local access and has high complexity, reducing the likelihood of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or workaround is currently documented, users should monitor vendor communications for updates. Given the local attack vector and high complexity, immediate urgent action is not indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2025-11-28T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69293eaf842b163e001fac42
Added to database: 11/28/2025, 06:18:23 UTC
Last enriched: 07/15/2026, 11:19:40 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 445
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