{"id":"CVE-2026-21723","state":"PUBLISHED","title":"CVE-2026-21723 Record","description":"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.","publishedAt":"2026-07-23T01:48:16.245Z","updatedAt":"2026-08-27T17:22:29.672Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GRAFANA"},"assigner":"GRAFANA","products":["Grafana Grafana OSS"],"affected":[{"vendor":"Grafana","product":"Grafana OSS","defaultStatus":"unaffected","versions":[{"version":"8.0.0","status":"affected","lessThanOrEqual":"11.0.0","versionType":"semver"},{"version":"11.0.0","status":"affected","lessThanOrEqual":"11.6.10","versionType":"semver"},{"version":"12.0.0","status":"affected","lessThanOrEqual":"12.0.9","versionType":"semver"},{"version":"12.1.0","status":"affected","lessThanOrEqual":"12.1.6","versionType":"semver"},{"version":"12.2.0","status":"affected","lessThanOrEqual":"12.2.4","versionType":"semver"},{"version":"12.3.0","status":"affected","lessThanOrEqual":"12.3.2","versionType":"semver"}]}],"references":["https://grafana.com/security/security-advisories/cve-2026-21723"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/21xxx/CVE-2026-21723.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-21723","state":"PUBLISHED","datePublished":"2026-07-23T01:48:16.245Z","dateUpdated":"2026-08-27T17:22:29.672Z","assignerShortName":"GRAFANA","assignerOrgId":"57da9224-a3e2-4646-9d0e-c4dc2e05e7da","dateReserved":"2026-01-05T09:26:06.214Z"},"containers":{"cna":{"title":"CVE-2026-21723 Record","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Grafana","product":"Grafana OSS","defaultStatus":"unaffected","versions":[{"version":"8.0.0","status":"affected","lessThanOrEqual":"11.0.0","versionType":"semver"},{"version":"11.0.0","status":"affected","lessThanOrEqual":"11.6.10","versionType":"semver"},{"version":"12.0.0","status":"affected","lessThanOrEqual":"12.0.9","versionType":"semver"},{"version":"12.1.0","status":"affected","lessThanOrEqual":"12.1.6","versionType":"semver"},{"version":"12.2.0","status":"affected","lessThanOrEqual":"12.2.4","versionType":"semver"},{"version":"12.3.0","status":"affected","lessThanOrEqual":"12.3.2","versionType":"semver"}]}],"references":[{"url":"https://grafana.com/security/security-advisories/cve-2026-21723","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"version":"3.1","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"}}],"providerMetadata":{"shortName":"GRAFANA","orgId":"57da9224-a3e2-4646-9d0e-c4dc2e05e7da","dateUpdated":"2026-08-27T17:22:29.672Z"},"datePublic":"2026-07-22T01:42:00.000Z","credits":[{"lang":"en","value":"nacl (Researcher)","type":"finder"}],"source":{"discovery":"BUG_BOUNTY"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-23T14:15:50.650728Z","id":"CVE-2026-21723","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","type":"CWE","lang":"en","description":"CWE-400 Uncontrolled Resource Consumption"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-23T14:16:10.097Z"}}]}}}