CVE-2026-28377

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-28377	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-26 22:16

Updated : 2026-06-17 13:20

NVD link : CVE-2026-28377

Mitre link : CVE-2026-28377

CVE.ORG link : CVE-2026-28377

JSON object : View

Products Affected

grafana

tempo

CWE

CWE-326

Inadequate Encryption Strength

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