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Security Advisories

CVE-2026-28377

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-28377

Severity

7.5

High

CVSS V3

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Summary

S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern)

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.

References

  • https://nvd.nist.gov/vuln/detail/CVE-2026-28377
  • https://github.com/advisories/GHSA-ffqx-q65f-36jf
  • https://pkg.go.dev/vuln/GO-2026-5359
  • https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28377.json
  • https://grafana.com/security/security-advisories/cve-2026-28377

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