Deadlock Vulnerability in Nezha Alerting Subsystem by Nezha
CVE-2026-105112

6MEDIUM

Key Information:

Vendor

Nezhahq

Status
Nezha
Vendor
CVE Published:
3 October 2026

What is CVE-2026-105112?

The identified weakness in Nezha versions prior to 2.3.13 allows authenticated non-admin users to cause severe disruptions in the alerting subsystem. Through a lock-order inversion vulnerability, attackers can target the notification-group and batch-delete endpoints, utilizing oversized ID lists to create race conditions. This scenario leads to an ABBA deadlock situation, effectively halting the alert delivery services until a system restart is performed. Mitigating this vulnerability is crucial to maintaining the integrity and reliability of alerting mechanisms within Nezha.

Affected Version(s)

nezha 1.8.0 < 2.3.13

nezha 2.3.13

References

https://github.com/nezhahq/nezha/security/advisories/GHSA...
vendor-advisory
https://www.vulncheck.com/advisories/nezha-1.8.0-before-2...
third-party-advisory

CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

sondt99
.