Vulnerability · Published Jul 15, 2026 · Assigned by mitre
CVE-2026-38974
Medium 5.3
In plain English
A medium-severity improper certificate validation in the dulwich package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 74.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | dulwich | no fix listed | DEBIAN-CVE-2026-38974 |
| Debian:13 | dulwich | no fix listed | DEBIAN-CVE-2026-38974 |
| Debian:14 | dulwich | 1.2.0-1 | DEBIAN-CVE-2026-38974 |
| Ubuntu:22.04:LTS | dulwich | no fix listed | UBUNTU-CVE-2026-38974 |
| Ubuntu:24.04:LTS | dulwich | no fix listed | UBUNTU-CVE-2026-38974 |
| Ubuntu:26.04:LTS | dulwich | no fix listed | UBUNTU-CVE-2026-38974 |
| Ubuntu:26.10 | dulwich | no fix listed | UBUNTU-CVE-2026-38974 |
Affected products (as reported)
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N