Is CVE-2026-28377 actively exploited?

No active exploitation of CVE-2026-28377 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-28377 be exploited remotely?

Yes. CVE-2026-28377 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-28377?

CVE-2026-28377 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-28377

Published: March 26, 2026· Updated: Mar 31, 2026

7.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-28377 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.