Bug 2561452 (CVE-2026-116748) - CVE-2026-116748 transmission: Transmission: Arbitrary code execution via overly permissive CORS policy
Summary: CVE-2026-116748 transmission: Transmission: Arbitrary code execution via over...
Keywords:
Status: NEW
Alias: CVE-2026-116748
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-26 22:33 UTC by OSIDB Bzimport
Modified: 2026-10-26 22:48 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-10-26 22:33:48 UTC 
Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response and replay it to issue RPC calls, enabling script-torrent-done execution, download-dir changes, or torrent and data deletion.
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