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Public proof of conceptFix available

CVE-2026-38978

A public proof of concept exists; no exploitation attested.

  • Published2026-06-02
  • WeaknessCWE-113

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

transmission through 4.1.1 was found to have a clickjacking weakness in the browser-facing WebUI and RPC response paths.

Timeline

dates in UTC
  1. 2026-06-0216:16CVE publishedNVD

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • transmissionUbuntu:26.04:LTSall versions · fixed in 4.1.1+dfsg-1ubuntu1.1
  • transmissionUbuntu:25.10all versions · fixed in 4.1.0~beta2+dfsg-3ubuntu1.1
  • transmissionUbuntu:24.04:LTSall versions · fixed in 4.0.5-1ubuntu0.1
  • transmissionUbuntu:22.04:LTSall versions · fixed in 3.00-2ubuntu2.2
  • transmissionUbuntu:20.04:LTSall versions · no fixed version listed
  • transmissionUbuntu:18.04:LTSall versions · no fixed version listed
  • transmissionUbuntu:16.04:LTSall versions · no fixed version listed
  • transmissionopenSUSE:Leap 16.0all versions · fixed in 4.0.6-bp160.2.1

4 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published
2026-06-02
Last Modified
2026-07-22
NVD status
Deferred
GitHub Advisory
GHSA-6rg3-8m29-j28q

Frequently asked questions

What is CVE-2026-38978?

transmission through 4.1.1 was found to have a clickjacking weakness in the browser-facing WebUI and RPC response paths.

Is CVE-2026-38978 actively exploited?

A proof-of-concept exploit exists for CVE-2026-38978, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-38978?

CVE-2026-38978 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Running transmission? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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Same product first, then the same vendor advisory and the same publication week.

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Sources for this record