CVE catalog
CVE-2026-21720
grafana-11.6.14+security01-1.1 on GA media
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.69% · Oct 25, 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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | grafana | 16.04 | 2.6.0+dfsg-1 | vulnerable |
| Opensuse | grafana | tumbleweed | 11.6.14+security01-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Opensuse | grafana | rpm | tumbleweed | 11.6.14+security01-1.1 | Not reported | OPENSUSE-SU-2026:10601-1 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_20654-1.json]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-21720]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10601-1]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21720.json]
[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]