CVE-2026-28377 — S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern)

CVE-2026-28377

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

Description (CNA)

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 (CNA)

Vendor / product	Versions
Grafana / Tempo	affected 2.10.3

CWE

No CWE identifiers supplied.

References

https://grafana.com/security/security-advisories/cve-2026-28377

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.