CVE-2026-28377

highCVSS 7.5covered by 1 sourcefirst seen 2026-03-27

A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3.

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Exploitation outlook

Low exploitation risk0.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.

Advisory coverage (1)

highGHSA-ffqx-q65f-36jf: Grafana Tempo has Inadequate Encryption Strengthghsa · 2026-03-27

External references

NVD record for CVE-2026-28377

CVE.org record

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