CVE-2026-15542

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH 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: 0%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(high)
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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
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 24× in last 7d / 45× 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.

  1. 2026-07-31 02:32 UTCEG score recompute
  2. 2026-07-31 02:32 UTCGHSA enrichment
  3. 2026-07-30 14:12 UTCEG score recompute
  4. 2026-07-30 14:11 UTCGHSA enrichment
  5. 2026-07-30 01:56 UTCEG score recompute
  6. 2026-07-30 01:56 UTCGHSA enrichment
  7. 2026-07-30 01:30 UTCEPSS rescore
  8. 2026-07-29 13:40 UTCGHSA enrichment
  9. 2026-07-29 01:23 UTCEG score recompute
  10. 2026-07-29 01:22 UTCGHSA enrichment
  11. 2026-07-28 15:36 UTCEPSS rescore
  12. 2026-07-28 13:07 UTCGHSA enrichment
  13. 2026-07-28 00:46 UTCEG score recompute
  14. 2026-07-28 00:46 UTCGHSA enrichment
  15. 2026-07-27 14:13 UTCEPSS rescore
  16. 2026-07-27 12:30 UTCGHSA enrichment
  17. 2026-07-27 00:15 UTCEG score recompute
  18. 2026-07-27 00:15 UTCGHSA enrichment
  19. 2026-07-26 14:54 UTCEPSS rescore
  20. 2026-07-26 14:54 UTCEPSS rescore
  21. 2026-07-26 11:58 UTCEG score recompute
  22. 2026-07-26 11:58 UTCGHSA enrichment
  23. 2026-07-25 14:17 UTCEPSS rescore
  24. 2026-07-24 14:17 UTCEPSS rescore
  25. 2026-07-23 14:18 UTCEPSS rescore
Show 20 more
  1. 2026-07-23 03:05 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 14:30 UTCEPSS rescore
  6. 2026-07-19 02:28 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 21:27 UTCGHSA enrichment
  9. 2026-07-16 17:02 UTCEPSS rescore
  10. 2026-07-16 09:12 UTCGHSA enrichment
  11. 2026-07-15 20:57 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 08:42 UTCGHSA enrichment
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-14 20:27 UTCGHSA enrichment
  16. 2026-07-14 08:12 UTCGHSA enrichment
  17. 2026-07-13 22:30 UTCEPSS rescore
  18. 2026-07-13 19:58 UTCGHSA enrichment
  19. 2026-07-13 07:43 UTCEG score recompute
  20. 2026-07-13 07:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 0% probability of exploitation in the next 30 days, which ranks it in the top 66.9% 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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