CVE catalog

CVE-2026-116748

transmission: CVE-2026-116748

Severity: Medium
Published: Oct 26, 2026, 10:16:59 PM UTC
Source: [NVD] · [CVE record]

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	transmission	sid	`4.1.3+dfsg-1`	fixed
Debian	transmission	forky	`4.1.3+dfsg-1`	fixed
Debian	transmission	trixie	`4.1.0~beta2+dfsg-3+deb13u2`	vulnerable
Debian	transmission	bookworm	`3.00-2.1+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	transmission	source	sid	`4.1.3+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	transmission	source	forky	`4.1.3+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	transmission	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	transmission	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[transmission]Affected
Details (2)
- 3.00-2.1+deb12u1 · all · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · all · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
[transmission-cli]Affected
Source package: [transmission]
Details (2)
- 3.00-2.1+deb12u1 · amd64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · arm64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
[transmission-common]Affected
Source package: [transmission]
Details (2)
- 3.00-2.1+deb12u1 · all · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · all · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
[transmission-daemon]Affected
Source package: [transmission]
Details (2)
- 3.00-2.1+deb12u1 · amd64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · arm64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
[transmission-gtk]Affected
Source package: [transmission]
Details (2)
- 3.00-2.1+deb12u1 · amd64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · arm64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
[transmission-qt]Affected
Source package: [transmission]
Details (2)
- 3.00-2.1+deb12u1 · amd64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12
- 3.00-2.1+deb12u1 · arm64 · bookworm
  Affected
  dsa · transmission · debian · bookworm; dsa · transmission · debian · 12

[Debian 13 (Trixie)]

[libtransmission-dev]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission]Affected
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission-cli]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission-common]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission-daemon]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission-gtk]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
[transmission-qt]Affected
Source package: [transmission]
Details (4)
- 4.1.0~beta2+dfsg-3+deb13u1 · amd64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.0~beta2+dfsg-3+deb13u1 · arm64 · trixie
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · transmission · debian · 13
- 4.1.3+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · transmission · debian · 13

Observed: Oct 27, 2026, 8:41:08 PM UTC

References

[Debian Security Tracker] · [OSV Package Vulnerability Database]