Vulnerability · Published Nov 28, 2025 · Assigned by mitre
CVE-2025-66382
Low 2.9
In plain English
A low-severity security flaw in libexpat from libexpat project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)2.9Low
Exploit odds (30 days)0.2%top 87.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | expat | no fix listed | DEBIAN-CVE-2025-66382 |
| Debian:13 | expat | no fix listed | DEBIAN-CVE-2025-66382 |
| Debian:14 | expat | no fix listed | DEBIAN-CVE-2025-66382 |
| Ubuntu:22.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:24.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | cadaver | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | cadaver | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:22.04:LTS | expat | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:24.04:LTS | expat | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | expat | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | expat | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | expat | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:22.04:LTS | insighttoolkit4 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:22.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:24.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | matanza | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | matanza | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | swish-e | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | swish-e | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:22.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:24.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | tdom | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | tdom | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:22.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:24.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | wbxml2 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | wbxml2 | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:25.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.04:LTS | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-66382 |
| Ubuntu:26.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-66382 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| libexpat project | libexpat | 0 – through 2.7.5 |
Weakness: CWE-407 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L