CVE-2026-15541

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 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: 0%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(high)
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
0%
EPSS %ILE
24%
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 20× in last 7d / 39× 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. 2026-07-30 01:30 UTCEPSS rescore
  2. 2026-07-30 01:09 UTCGHSA enrichment
  3. 2026-07-29 12:58 UTCGHSA enrichment
  4. 2026-07-29 00:49 UTCEG score recompute
  5. 2026-07-29 00:49 UTCGHSA enrichment
  6. 2026-07-28 15:36 UTCEPSS rescore
  7. 2026-07-28 12:39 UTCGHSA enrichment
  8. 2026-07-28 00:29 UTCEG score recompute
  9. 2026-07-28 00:29 UTCGHSA enrichment
  10. 2026-07-27 14:13 UTCEPSS rescore
  11. 2026-07-27 12:19 UTCGHSA enrichment
  12. 2026-07-27 00:08 UTCEG score recompute
  13. 2026-07-27 00:08 UTCGHSA enrichment
  14. 2026-07-26 14:54 UTCEPSS rescore
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-26 11:58 UTCEG score recompute
  17. 2026-07-26 11:58 UTCGHSA enrichment
  18. 2026-07-25 14:17 UTCEPSS rescore
  19. 2026-07-24 14:17 UTCEPSS rescore
  20. 2026-07-23 14:18 UTCEPSS rescore
  21. 2026-07-23 03:05 UTCEG score recompute
  22. 2026-07-22 14:08 UTCEPSS rescore
  23. 2026-07-21 15:24 UTCEPSS rescore
  24. 2026-07-20 17:08 UTCEPSS rescore
  25. 2026-07-19 02:28 UTCEPSS rescore
Show 14 more
  1. 2026-07-18 10:04 UTCEPSS rescore
  2. 2026-07-16 20:52 UTCGHSA enrichment
  3. 2026-07-16 17:02 UTCEPSS rescore
  4. 2026-07-16 08:43 UTCGHSA enrichment
  5. 2026-07-15 20:34 UTCGHSA enrichment
  6. 2026-07-15 16:57 UTCEPSS rescore
  7. 2026-07-15 08:24 UTCGHSA enrichment
  8. 2026-07-15 02:00 UTCEPSS rescore
  9. 2026-07-14 20:13 UTCGHSA enrichment
  10. 2026-07-14 08:03 UTCGHSA enrichment
  11. 2026-07-13 22:30 UTCEPSS rescore
  12. 2026-07-13 19:52 UTCGHSA enrichment
  13. 2026-07-13 07:43 UTCEG score recompute
  14. 2026-07-13 07:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 0% probability of exploitation in the next 30 days, which ranks it in the top 76.0% 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-15541

Explore →

Is Your Infrastructure Affected by CVE-2026-15541?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs