Vulnerabilities
Projects
Vulnerability Disclosure
About Us
Contact Us
Mend.io Vulnerability Database
What is a WS vulnerability ID?
What is an MSC vulnerability ID?
We found results for “”
CVE-2026-21720
Good to know:
Date: January 27, 2026
Every uncached /avatar/:hash request spawns a goroutine that refreshes the Gravatar image. If the refresh sits in the 10-slot worker queue longer than three seconds, the handler times out and stops listening for the result, so that goroutine blocks forever trying to send on an unbuffered channel. Sustained traffic with random hashes keeps tripping this timeout, so goroutine count grows linearly, eventually exhausting memory and causing Grafana to crash on some systems.
Severity Score
Severity Score
Weakness Type (CWE)
Top Fix
Upgrade Version
Upgrade to version github.com/grafana/grafana - v0.0.0-20260127211734-36e7d6fddba6;https://github.com/grafana/grafana.git - v12.3.2;https://github.com/grafana/grafana.git - v12.2.4;https://github.com/grafana/grafana.git - v12.1.6;https://github.com/grafana/grafana.git - v12.0.9;https://github.com/grafana/grafana.git - v11.6.10
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | HIGH |