Grafana Tempo: Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-2342 · first 15.07.2026 · updated 15.07.2026 · CVSS 7,5
What it is about
Grafana Tempo ist ein hochskalierbares, verteiltes Tracing-Backend. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Grafana Tempo ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Grafana Tempo <2.8.8
- Grafana Tempo <2.10.2
- Grafana Tempo <2.8.4
- Grafana Tempo <2.9.2
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Grafana Tempo 2.8.8
- Grafana Tempo 2.10.2
- Grafana Tempo 2.8.4
- Grafana Tempo 2.9.2
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Grafana Labs vom 2026-07-14 grafana.com
- Grafana Labs vom 2026-07-14 grafana.com
CVE: CVE-2026-21728, CVE-2026-27878
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.