Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Grafana | Tempo | 2.10.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tempo-cli | 2.10.3-1.1 | openSUSE-SU-2026:10390-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | grafana-12.3 +2 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/grafana/tempo | < 2.10.3 | 2.10.3 | GHSA-ffqx-q65f-36jf |
| Go | github.com/grafana/tempo | all versions | — | GO-2026-5359 |
Advisories 3
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- WID-SEC-2026-0764 Grafana Tempo: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Mar 26, 2026
- openSUSE-SU-2026:10390-1 tempo-cli-2.10.3-1.1 on GA media SUSE / openSUSE Security Updates · Mar 19, 2026
References
- https://grafana.com/security/security-advisories/cve-2026-28377 vendor-advisory