CVE-2026-27878Medium· 6.5▾ SunlitGrafana Tempo vulnerable to an out-of-memory crash
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 29.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.4%
Last analysed / modified upstream
A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
github.com/grafana/tempo < 1.5.1-0.20260303204923-b13f74291d48Upgrade to a patched release:
github.com/grafana/tempo 1.5.1-0.20260303204923-b13f74291d48Connected by shared product, vendor, weakness, or advisory.
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