CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-28377
High (7.5) in grafana tempo. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/grafana/tempo 2.10.3.
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.
Thanks to william_goodfellow for reporting this vulnerability.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-31)
- CWE
- CWE-326
- Published
- Modified
- Record from
- the NVD, synced
Affected
- grafana:tempo
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-ffqx-q65f-36jf | Go | github.com/grafana/tempo | <2.10.3 | 2.10.3 |
| GO-2026-5359 | Go | github.com/grafana/tempo | all versions | no fix published |