TempoGHSA-ffqx-q65f-36jf
Grafana Tempo has Inadequate Encryption Strength
High7.5CVE-2026-28377 · Published Mar 27, 2026 · updated Sep 10, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| github.com/grafana/tempo Go | < 2.10.3 | 2.10.3 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-326
- Also known as
- CVE-2026-28377, GO-2026-5359
- nvd.nist.gov/vuln/detail/CVE-2026-28377
- github.com/grafana/tempo/commit/bb8ca663db34a0980c9758b40d918fda3b4dbec3
- github.com/advisories/GHSA-ffqx-q65f-36jf
- github.com/grafana/tempo
- github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/CHANGELOG.md?plain=1#L135
- grafana.com/security/security-advisories/cve-2026-28377
More Tempo advisories
All Tempo| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jun 19 | Grafana Tempo vulnerable to an out-of-memory crash Medium6.5Jun 19 | Medium6.5 | 1.5.1-0.20260303204923-b13f74291d48 |
| Apr 24 | Grafana Tempo has an Uncontrolled Resource Consumption issueHigh7.5Apr 24 | High7.5 | 2.8.4+2 more |