Vulnerabilities CVE-2026-28377

CVE-2026-28377

High

Open

TLP:CLEAR

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

NVD CVE.org

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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.

Details

CVSS Score: 7.5
EPSS Score ⓘ: 0.16%

5.1th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Confidence: 90%
Published: Mar 26, 2026
Last Modified: Aug 11, 2026

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