CVE-2025-66382 — Inefficient Algorithmic Complexity in Project Libexpat

CWE-407 — Inefficient Algorithmic Complexity7 documents7 sources
Severity
5.5MEDIUMNVD
CNA2.9
EPSS
0.0%
top 98.76%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Libexpat Project Libexpat
Timeline
PublishedNov 28

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 vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5libexpat_project/libexpat2.7.5

🔴Vulnerability Details

3
OSV
CVE-2025-66382: In libexpat through 2↗2025-11-28
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GHSA
GHSA-93q9-crcw-vwgq: In libexpat through 2↗2025-11-28
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CVEList
CVE-2025-66382: In libexpat through 2↗2025-11-28
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📋Vendor Advisories

3
Red Hat
libexpat: libexpat: Denial of service via crafted file processing↗2025-11-28
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Microsoft
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.↗2025-11-11
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Debian
CVE-2025-66382: expat - In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can ...↗2025
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CVE-2025-66382 — Inefficient Algorithmic Complexity | cvebase