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CVE-2026-28377

HIGH CVSS 3.1: 7.5 EPSS 0.01%
Updated Mar 31, 2026
Grafana
Parameter Value
CVSS 7.5 (HIGH)
Affected Versions before 2.10.3
Fixed In 2.10.3
Type CWE-326
Vendor Grafana
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Grafana Tempo
cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*
2.10.3