What’s Vulnerable › Vulnerabilities
CVE-2026-28377: S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern)
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-26 · updated 2026-06-17
- Weakness: CWE-326
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
- Grafana Tempo: before 2.10.3 — fixed in 2.10.3
How to fix
Upgrade to a fixed version: Grafana Tempo 2.10.3. Check the vendor advisory for mitigations.
References
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