CVE Explorer

CVE-2026-21723

The alertmanager templates test endpoint (/api/alertmanager/grafana/config/api/v1/templates/test) can execute templates with no memory limits. Mass-executing templates in a short period causes OOM and crashes the Grafana service. The endpoint requires very low privileges and is exploitable with anonymous access enabled.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c19b580ec538f60f1bbc5c26be1e3361dbd69ae235f8bd071cc63cdd28e8b99b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Grafana OSS","vendor":"Grafana","versions":[{"lessThanOrEqual":"11.0.0","status":"affected","version":"8.0.0","versionType":"semver"},{"lessThanOrEqual":"11.6.10","status":"affected","version":"11.0.0","versionType":"semver"},{"lessThanOrEqual":"12.0.9","status":"affected","version":"12.0.0","versionType":"semver"},{"lessThanOrEqual":"12.1.6","status":"affected","version":"12.1.0","versionType":"semver"},{"lessThanOrEqual":"12.2.4","status":"affected","version":"12.2.0","versionType":"semver"},{"lessThanOrEqual":"12.3.2","status":"affected","version":"1…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:8b358431c32ab13cf44cd9c037406c7d6791eb224a1e28647ca5c380bd64c7f3 · sha256:6f131f4c48d562a9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8b358431c32ab13cf44cd9c037406c7d6791eb224a1e28647ca5c380bd64c7f3 · sha256:6f131f4c48d562a9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8b358431c32ab13cf44cd9c037406c7d6791eb224a1e28647ca5c380bd64c7f3 · sha256:6f131f4c48d562a9… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["vendor-advisory"],"url":"https://grafana.com/security/security-advisories/cve-2026-21723"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8b358431c32ab13cf44cd9c037406c7d6791eb224a1e28647ca5c380bd64c7f3 · sha256:6f131f4c48d562a9… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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