CVE-2026-38978

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Elevated
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

A fix is available — apply it.

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

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
22.7%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jun 13, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

[BUG] Missing anti-clickjacking headers on Transmission WebUI and RPC responses · Issue #8726 · transmission/transmission · GitHub

https://github.com/transmission/transmission/issues/8726
github_pr

fix: add clickjack safeguards when serving http responses

Fix merged in transmission/transmission PR #8747 on 2026-03-31 — awaiting tagged release

https://github.com/transmission/transmission/pull/8747
github_commit

commit 6b24c1c214ec (transmission/transmission)

Fix landed in transmission/transmission commit 6b24c1c214ec — awaiting tagged release

https://github.com/transmission/transmission/commit/6b24c1c214ec6a44fa5fdff0ce7da6b16d8ecaa8

Vendor Advisories for CVE-2026-38978(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntutransmission-qt (4.1.1+dfsg-1ubuntu1.1) @ resolute2026-07-16ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 60× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-07-23 03:10 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-16 01:15 UTCVendor advisory
  10. 2026-07-16 01:15 UTCGHSA enrichment
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-14 03:47 UTCVendor advisory
  15. 2026-07-14 03:47 UTCGHSA enrichment
  16. 2026-07-13 22:30 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-11 13:15 UTCVendor advisory
  21. 2026-07-11 13:15 UTCGHSA enrichment
  22. 2026-07-11 08:27 UTCEPSS rescore
  23. 2026-07-09 19:10 UTCEPSS rescore
  24. 2026-07-08 16:45 UTCGHSA enrichment
  25. 2026-07-08 15:15 UTCEPSS rescore
Show 75 more
  1. 2026-07-07 13:46 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-04 00:15 UTCVendor advisory
  9. 2026-07-04 00:15 UTCGHSA enrichment
  10. 2026-07-02 01:45 UTCVendor advisory
  11. 2026-07-02 01:45 UTCGHSA enrichment
  12. 2026-07-01 15:06 UTCEPSS rescore
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-30 23:01 UTCVendor advisory
  15. 2026-06-30 23:01 UTCGHSA enrichment
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 11:17 UTCVendor advisory
  18. 2026-06-29 11:17 UTCGHSA enrichment
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 09:06 UTCVendor advisory
  21. 2026-06-28 09:06 UTCGHSA enrichment
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 07:08 UTCVendor advisory
  24. 2026-06-27 07:08 UTCGHSA enrichment
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-26 05:13 UTCVendor advisory
  27. 2026-06-26 05:13 UTCGHSA enrichment
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-25 13:49 UTCEPSS rescore
  30. 2026-06-25 03:18 UTCVendor advisory
  31. 2026-06-25 03:18 UTCGHSA enrichment
  32. 2026-06-24 14:05 UTCEPSS rescore
  33. 2026-06-24 01:21 UTCVendor advisory
  34. 2026-06-24 01:20 UTCGHSA enrichment
  35. 2026-06-23 21:33 UTCEPSS rescore
  36. 2026-06-22 14:25 UTCEPSS rescore
  37. 2026-06-22 14:25 UTCEPSS rescore
  38. 2026-06-21 14:56 UTCEPSS rescore
  39. 2026-06-21 14:56 UTCEPSS rescore
  40. 2026-06-21 01:59 UTCEPSS rescore
  41. 2026-06-20 13:19 UTCGHSA enrichment
  42. 2026-06-19 19:25 UTCEPSS rescore
  43. 2026-06-19 19:25 UTCEPSS rescore
  44. 2026-06-18 17:52 UTCEPSS rescore
  45. 2026-06-18 17:52 UTCEPSS rescore
  46. 2026-06-18 02:02 UTCVendor advisory
  47. 2026-06-18 02:01 UTCGHSA enrichment
  48. 2026-06-17 17:53 UTCEPSS rescore
  49. 2026-06-17 00:06 UTCVendor advisory
  50. 2026-06-17 00:05 UTCGHSA enrichment
  51. 2026-06-16 17:52 UTCEPSS rescore
  52. 2026-06-15 22:10 UTCVendor advisory
  53. 2026-06-15 22:10 UTCGHSA enrichment
  54. 2026-06-15 17:49 UTCEPSS rescore
  55. 2026-06-14 23:18 UTCEPSS rescore
  56. 2026-06-14 20:01 UTCVendor advisory
  57. 2026-06-14 20:01 UTCGHSA enrichment
  58. 2026-06-13 23:00 UTCEPSS rescore
  59. 2026-06-13 18:05 UTCGHSA enrichment
  60. 2026-06-12 23:12 UTCEPSS rescore
  61. 2026-06-12 23:12 UTCEPSS rescore
  62. 2026-06-12 16:07 UTCVendor advisory
  63. 2026-06-12 16:07 UTCGHSA enrichment
  64. 2026-06-11 14:11 UTCVendor advisory
  65. 2026-06-11 14:11 UTCGHSA enrichment
  66. 2026-06-11 14:00 UTCEPSS rescore
  67. 2026-06-10 22:18 UTCEPSS rescore
  68. 2026-06-10 13:22 UTCEPSS rescore
  69. 2026-06-10 12:16 UTCVendor advisory
  70. 2026-06-10 12:16 UTCGHSA enrichment
  71. 2026-06-09 10:21 UTCVendor advisory
  72. 2026-06-09 10:20 UTCGHSA enrichment
  73. 2026-06-08 14:17 UTCEPSS rescore
  74. 2026-06-08 14:17 UTCEPSS rescore
  75. 2026-06-08 08:25 UTCEG score recompute▲ 5.30

Frequently asked(5)

What is CVE-2026-38978?
CVE-2026-38978 is a medium vulnerability published on June 2, 2026. transmission through 4.1.1 was found to have a clickjacking weakness in the browser-facing WebUI and RPC response paths.
When was CVE-2026-38978 disclosed?
CVE-2026-38978 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38978 actively exploited?
CVE-2026-38978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-38978?
CVE-2026-38978 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38978?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-38978, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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