Vulnerability · Published Mar 16, 2026 · Assigned by mitre
CVE-2026-32777
Medium 4.0
In plain English
A medium-severity infinite loop 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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.2%top 86.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | expat | 2.7.5-r0 | ALPINE-CVE-2026-32777 |
| Alpine:v3.21 | expat | 2.7.5-r0 | ALPINE-CVE-2026-32777 |
| Alpine:v3.22 | expat | 2.7.5-r0 | ALPINE-CVE-2026-32777 |
| Alpine:v3.23 | expat | 2.7.5-r0 | ALPINE-CVE-2026-32777 |
| Alpine:v3.24 | expat | 2.7.5-r0 | ALPINE-CVE-2026-32777 |
| Debian:12 | expat | 2.5.0-1+deb12u4 | DEBIAN-CVE-2026-32777 |
| Debian:13 | expat | 2.8.2-1~deb13u1 | DEBIAN-CVE-2026-32777 |
| Debian:14 | expat | 2.7.5-1 | DEBIAN-CVE-2026-32777 |
| Ubuntu:22.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:24.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | cadaver | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | cadaver | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:22.04:LTS | expat | 2.4.7-1ubuntu0.8 | UBUNTU-CVE-2026-32777 |
| Ubuntu:22.04:LTS | expat | 2.4.7-1ubuntu0.8 | USN-8790-1 |
| Ubuntu:24.04:LTS | expat | 2.6.1-2ubuntu0.5 | USN-8790-1 |
| Ubuntu:24.04:LTS | expat | 2.6.1-2ubuntu0.5 | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | expat | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | expat | 2.7.4-1ubuntu0.1 | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | expat | 2.7.4-1ubuntu0.1 | USN-8790-1 |
| Ubuntu:22.04:LTS | insighttoolkit4 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:22.04:LTS | matanza | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:24.04:LTS | matanza | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | matanza | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | matanza | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | matanza | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | swish-e | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | swish-e | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:22.04:LTS | tdom | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:24.04:LTS | tdom | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | tdom | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | tdom | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | tdom | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:22.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:24.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | wbxml2 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | wbxml2 | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:25.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.04:LTS | xmlrpc-c | no fix listed | UBUNTU-CVE-2026-32777 |
| Ubuntu:26.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2026-32777 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| libexpat project | libexpat | 0 – before 2.7.5 |
Weakness: CWE-835 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L