CVE-2026-15542

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 week
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: None knownExposed: 0

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

A vulnerability has been found in will-moss Isaiah up to 1.36.9. This affects an unknown function of the file app/main.go of the component Websocket Connection Authentication. The manipulation leads to improper authentication. The attack can be initiated remotely. The pull request to fix this issue awaits acceptance.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 15, 2026

Advisory Details (3)

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

Trust only configured proxies for forward proxy authentication

Upstream fix in progress (PR #36 · will-moss/isaiah, state=open)

https://github.com/will-moss/isaiah/pull/36
generic

Forward proxy authentication trusts client-supplied header when backend is reachable · Issue #33 · will-moss/isaiah · GitHub

https://github.com/will-moss/isaiah/issues/33
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-2026-15542(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 106× 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 151 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-15542?
CVE-2026-15542 is a high vulnerability published on July 13, 2026. A vulnerability has been found in will-moss Isaiah up to 1.36.9. This affects an unknown function of the file app/main.go of the component Websocket Connection Authentication. The manipulation leads to improper authentication. The attack can be initiated remotely. The pull request to fix this issue…
When was CVE-2026-15542 disclosed?
CVE-2026-15542 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15542 actively exploited?
CVE-2026-15542 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 49.9% of all scored CVEs.
What is the CVSS score of CVE-2026-15542?
CVE-2026-15542 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-15542?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15542, 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.

Dependency Blast Radius

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