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CVE-2025-66382

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Date: November 27, 2025

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.

Severity Score

Related Resources (4)

https://github.com/libexpat/libexpat/issues/1076
https://nvd.nist.gov/vuln/detail/CVE-2025-66382
http://www.openwall.com/lists/oss-security/2025/12/02/1
https://www.mend.io/vulnerability-database/CVE-2025-66382

Severity Score

Weakness Type (CWE)

Inefficient Algorithmic Complexity

CWE-407

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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