Missing Release of Resource after Effective Lifetime Affecting github.com/grafana/grafana/pkg/api package, versions >=3.0.0 <11.6.9+security-01>=12.0.0 <12.0.8+security-01>=12.1.0 <12.1.5+security-01>=12.2.0 <12.2.3+security-01>=12.3.0 <12.3.1+security-01
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMGRAFANAGRAFANAPKGAPI-15127990
- published29 Jan 2026
- disclosed27 Jan 2026
- creditUnknown
Introduced: 27 Jan 2026
CVE-2026-21720 Â (opens in a new tab)How to fix?
Upgrade github.com/grafana/grafana/pkg/api to version 11.6.9+security-01, 12.0.8+security-01, 12.1.5+security-01, 12.2.3+security-01, 12.3.1+security-01 or higher.
Overview
github.com/grafana/grafana/pkg/api is an open and composable observability and data visualization platform.
Affected versions of this package are vulnerable to Missing Release of Resource after Effective Lifetime via the /avatar/:hash endpoint. An attacker can exhaust system memory and cause service crashes by sending sustained requests that trigger goroutine leaks during timed-out Gravatar image refreshes.
Workaround
This vulnerability can be mitigated by disabling Gravatar support in the configuration file by setting allow_gravatar = false under the [users] section and restarting the service.