[HIGH] CVE-2026-15541 — CVSS 7.3 (July 13, 2026)

A HIGH-severity vulnerability identified as CVE-2026-15541 has been published on July 13, 2026 with a CVSS base score of 7.3. This security advisory provides a detailed breakdown of the vulnerability, its potential impact, weakness classification, and actionable steps to protect your systems.

Vulnerability Details

CVE ID: CVE-2026-15541
Severity: HIGH
CVSS Score: 7.3
Published: July 13, 2026
Weakness (CWE): CWE-862

Technical Description

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.

Potential Impact

If exploited, this high-severity vulnerability could allow an attacker to cause significant damage to affected systems. Organizations running affected software should treat this as a priority remediation item.

Recommended Action

No official patch is available yet. Until one is released:

1. Monitor the official NVD page and vendor channels for patch announcements.
2. Restrict access to the affected system or service where possible.
3. Apply network-level mitigations such as firewall rules or WAF policies.
4. Enable logging and alerting for anomalous activity related to this vulnerability.
5. Review your incident response plan in case of active exploitation.

View full details on NVD →

References

• Reference 1
• Reference 2
• Reference 3
• Reference 4
• Reference 5

Related Security Advisories

• [HIGH] CVE-2026-11912 — CVSS 7.5 (June 20, 2026) — HIGH / CVSS 7.5
• [HIGH] CVE-2026-5200 — CVSS 8.8 (May 20, 2026) — HIGH / CVSS 8.8
• [HIGH] CVE-2026-1359 — CVSS 8.8 (July 11, 2026) — HIGH / CVSS 8.8