A HIGH-severity vulnerability identified as CVE-2026-23926 has been published on May 6, 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-2026-23926
Severity: HIGH
CVSS Score: 7.3
Published: May 6, 2026
Weakness (CWE): CWE-79
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | High |
| User Interaction | Passive |
Technical Description
An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.
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:
- Monitor the official NVD page and vendor channels for patch announcements.
- Restrict access to the affected system or service where possible.
- Apply network-level mitigations such as firewall rules or WAF policies.
- Enable logging and alerting for anomalous activity related to this vulnerability.
- Review your incident response plan in case of active exploitation.
References
Related Security Advisories
- [HIGH] CVE-2026-23928 — CVSS 7.3 (May 6, 2026) — HIGH / CVSS 7.3
- [HIGH] CVE-2025-40899 — CVSS 8.9 (April 15, 2026) — HIGH / CVSS 8.9
- [HIGH] CVE-2026-3359 — CVSS 7.5 (May 5, 2026) — HIGH / CVSS 7.5
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