Vulnerability · Published Jun 2, 2026 · Assigned by mitre
CVE-2026-38978
Medium 5.3
In plain English
A medium-severity security flaw in the transmission package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% 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 76.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
transmission through 4.1.1 was found to have a clickjacking weakness in the browser-facing WebUI and RPC response paths.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | transmission | no fix listed | DEBIAN-CVE-2026-38978 |
| Debian:13 | transmission | 4.1.0~beta2+dfsg-3+deb13u2 | DEBIAN-CVE-2026-38978 |
| Debian:14 | transmission | 4.1.2+dfsg-1 | DEBIAN-CVE-2026-38978 |
| Ubuntu:22.04:LTS | transmission | 3.00-2ubuntu2.2 | USN-8404-1 |
| Ubuntu:22.04:LTS | transmission | 3.00-2ubuntu2.2 | UBUNTU-CVE-2026-38978 |
| Ubuntu:24.04:LTS | transmission | 4.0.5-1ubuntu0.1 | USN-8404-1 |
| Ubuntu:24.04:LTS | transmission | 4.0.5-1ubuntu0.1 | UBUNTU-CVE-2026-38978 |
| Ubuntu:25.10 | transmission | 4.1.0~beta2+dfsg-3ubuntu1.1 | USN-8404-1 |
| Ubuntu:25.10 | transmission | 4.1.0~beta2+dfsg-3ubuntu1.1 | UBUNTU-CVE-2026-38978 |
| Ubuntu:26.04:LTS | transmission | 4.1.1+dfsg-1ubuntu1.1 | UBUNTU-CVE-2026-38978 |
| Ubuntu:26.04:LTS | transmission | 4.1.1+dfsg-1ubuntu1.1 | USN-8404-1 |
Affected products (as reported)
Weakness: CWE-113 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N