Vulnerability · Published Oct 3, 2026 · Assigned by VulnCheck
CVE-2026-105112Nezha 1.8.0 before 2.3.13 Deadlock DoS via notification-group endpoints
Medium 5.3
In plain English
A medium-severity race condition in nezha from nezhahq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 87.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Nezha from 1.8.0 before 2.3.13 contains a lock-order inversion in UpdateGroup and DeleteGroup that allows authenticated non-admin users to deadlock the alerting subsystem. Attackers can concurrently call the notification-group and batch-delete endpoints with oversized id lists to widen the race and close an ABBA cycle, permanently killing alert delivery until restart.
Affected products (as reported)
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-53vr-p24v-qvwf) vendor-advisory
- VulnCheck Advisory: Nezha 1.8.0 before 2.3.13 Deadlock DoS via notification-group endpoints third-party-advisory