Nezha before 2.3.1 Denial of Service via Concurrent Server Delete
Nezha is a server and website monitoring tool. In versions >= 2.2.11 and < 2.3.1, the service sentinel worker (service/singleton/servicesentinel.go) contains an incomplete fix for a previously reported nil dereference denial of service (GHSA-qjpp-gffx-2wm9). The 2026-07-21 fix re-validated the service lifecycle under serviceResponseDataStoreLock but reused an already-captured, now stale reporter pointer and never re-validated the server, and that lock does not guard ServerShared. An authenticated user with the member role who owns an agent can issue a concurrent server delete (POST /api/v1/batch-delete/server) for their own server to win the race window, causing the worker to dereference a missing entry in the server list snapshot. Because the sentinel workers and the gRPC server have no recover()/recovery interceptor, the resulting panic is unrecovered and crashes the entire instance. This is fixed in version 2.3.1.
CVE-2026-101088
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101088
nezha
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "nezhahq",
"product": "nezha",
"versions": [
{
"status": "affected",
"version": "2.2.11",
"lessThan": "2.3.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.3.1",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/nezhahq/nezha",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-101088
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #4971 · Revision 1
- Added to Heist Feed
- Publisher date