Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck

CVE-2026-101085Nezha before 2.3.8 Denial of Service via Alert Rule

Medium 6.5

In plain English

A medium-severity security flaw in nezha from nezhahq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 77.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Nezha before 2.3.8 fails to validate alert rule type and duration bounds, allowing authenticated non-administrator users to create malformed rules that trigger unrecovered panics in the alert evaluator goroutine. Attackers can submit a crafted alert rule via the POST /api/v1/alert-rule endpoint to crash the dashboard process, which persists the rule and causes repeated crashes on restart, disabling all monitoring and control plane functionality.

Affected products (as reported)

Vendor	Product	Versions
nezhahq	nezha	0 – before 2.3.8

Weakness: CWE-197 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-2qc6-x993-hjq9) vendor-advisory
VulnCheck Advisory: Nezha before 2.3.8 Denial of Service via Alert Rule third-party-advisory