---
id: CVE-2026-105112
title: >-
  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
summary: >-
  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-…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
vendor: nezhahq
product: nezha
affected:
  - nezha >= 1.8.0 < 2.3.13
published: '2026-10-03'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T14:16:37.677'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105112'
references:
  - url: 'https://github.com/nezhahq/nezha/security/advisories/GHSA-53vr-p24v-qvwf'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/nezha-1.8.0-before-2.3.13-deadlock-dos-via-notification-group-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-03T14:47:06.462Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.