[NEW] [medium] Grafana: Vulnerability allows denial of service

mediumCVE-2026-21723

A remote, authenticated attacker can exploit a vulnerability in Grafana to carry out a denial of service attack.

CSIRTS triage

vendor: Grafana product: Grafana Denial of service

What: A remote, authenticated attacker can exploit a vulnerability in Grafana to carry out a denial of service attack.
Who is affected: Authenticated users of Grafana.
Urgency: Remediation is medium urgency as it requires authenticated access to exploit.
Action: Upgrade to the latest version of Grafana to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-23
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2490

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-217230.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-21723	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

mediumCVE-2026-21723: The alertmanager templates test endpoint (/api/alertmanager/grafana/config/api/v1/templates/te…nvd

Recent advisories for Grafana

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-67342: ArcadeDB versions before 26.7.2 contain an authorization bypass vulnerability in HTTP handlers…nvd · 2026-08-01
medium[UPDATE] [medium] Grafana: Vulnerability allows privilege escalationcert-bund · 2026-07-31
medium[UPDATE] [medium] Grafana: Multiple vulnerabilitiescert-bund · 2026-07-29
high[NEW] [high] Grafana: Vulnerability allows file manipulationcert-bund · 2026-07-20
high[UPDATE] [high] Grafana: Multiple vulnerabilitiescert-bund · 2026-07-20
medium[NEW] [medium] Grafana: Multiple vulnerabilitiescert-bund · 2026-07-20