========================================================================== Ubuntu Security Notice USN-8404-1 June 08, 2026
transmission vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Transmission could allow unintended actions if a user visited a malicious website. Software Description: - transmission: lightweight BitTorrent client Details: It was discovered that Transmission had a clickjacking weakness in the browser-facing WebUI and RPC response paths. An attacker could possibly use this issue to trick users into performing unintended actions. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS transmission 4.1.1+dfsg-1ubuntu1.1 transmission-daemon 4.1.1+dfsg-1ubuntu1.1 Ubuntu 25.10 transmission 4.1.0~beta2+dfsg-3ubuntu1.1 transmission-daemon 4.1.0~beta2+dfsg-3ubuntu1.1 Ubuntu 24.04 LTS transmission 4.0.5-1ubuntu0.1 transmission-daemon 4.0.5-1ubuntu0.1 Ubuntu 22.04 LTS transmission 3.00-2ubuntu2.2 transmission-daemon 3.00-2ubuntu2.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8404-1 CVE-2026-38978 Package Information: https://launchpad.net/ubuntu/+source/transmission/4.1.1+dfsg-1ubuntu1.1 https://launchpad.net/ubuntu/+source/transmission/4.1.0~beta2+dfsg-3ubuntu1.1 https://launchpad.net/ubuntu/+source/transmission/4.0.5-1ubuntu0.1 https://launchpad.net/ubuntu/+source/transmission/3.00-2ubuntu2.2
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