CVE-2026-15541

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-07-13. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity73% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Advisory Details (3)

Auto-updated Jul 13, 2026
No patch confirmed yet. Sources: github_pr.
github_pr

Require authentication before forwarding agent commands

Upstream fix in progress (PR #35 · will-moss/isaiah, state=open)

https://github.com/will-moss/isaiah/pull/35
generic

Authentication bypass in Agent forwarding path before Master session check · Issue #34 · will-moss/isaiah · GitHub

https://github.com/will-moss/isaiah/issues/34
generic

GitHub - will-moss/isaiah: Self-hostable clone of lazydocker for the web. Manage your Docker fleet with ease · GitHub

https://github.com/will-moss/isaiah/

Vendor Advisories for CVE-2026-15541(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 109× 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 153 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-15541?
CVE-2026-15541 is a high vulnerability published on July 13, 2026. A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch…
When was CVE-2026-15541 disclosed?
CVE-2026-15541 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15541 actively exploited?
CVE-2026-15541 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15541?
CVE-2026-15541 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-15541?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15541, 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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