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VULNERABILITIES

CVE-2026-116748 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/transmission/transmission [email protected]
https://github.com/transmission/transmission/blob/4.1.2/libtransmission/rpc-server.cc#L560 [email protected]
https://github.com/transmission/transmission/commit/c6a1bd2017a0fea9c956737c213f23e4b0f7929e [email protected]
https://github.com/transmission/transmission/pull/8938 [email protected]
https://github.com/transmission/transmission/releases/tag/4.1.3 [email protected]

see all 7 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-942Permissive Cross-domain Policy with Untrusted Domains[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-116748
NVD Published Date:
Oct 26, 2026
NVD Last Modified:
Oct 31, 2026
Source:
[email protected]
CVE-2026-116748 Details - Not Deferred