high7.5
CVE-2026-28377
A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users …
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/grafana/tempo | < 2.10.3 | 2.10.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Grafana | Tempo | before 2.10.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-ffqx-q65f-36jf
- https://nvd.nist.gov/vuln/detail/CVE-2026-28377
- https://grafana.com/security/security-advisories/cve-2026-28377
- https://github.com/grafana/tempo/commit/bb8ca663db34a0980c9758b40d918fda3b4dbec3
- https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/CHANGELOG.md?plain=1#L135