CVE-2026-19898 VictoriaMetrics VMAuth Authentication Endpoint main.go requestHandler excessive authentication
Attackers can bypass authentication rate limits in VictoriaMetrics VMAuth, potentially enabling brute-force attacks against the authentication endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19898?
CVE-2026-19898 is a medium-severity vulnerability in VictoriaMetrics, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in VictoriaMetrics up to 1.146.0. Impacted is the function requestHandler of the file app/vmauth/main.go of the component VMAuth Authentication Endpoint. Performing a manipulation results in improper restriction of excessive authentication attempts. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitability is considered difficult. The exploit has been made public and could be used. Upgrading to version 1.147.0 is recommended to address this issue. The patch is named 119ba0fb5be8024d50c5ba946599b2e69e8803ea. Upgrading the affected component is recommended.
Which versions are affected by CVE-2026-19898?
How do I fix CVE-2026-19898?
No fix has been published for CVE-2026-19898 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19898 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19898 exists.
Sources
Also known as GHSA-c7pm-322g-r9gf, GHSA-wmqf-q66j-3h4j.