CVE-2026-28377 — HIGH (7.5)

Q: How severe is CVE-2026-28377?

CVE-2026-28377 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-28377?

Check the references section above for vendor advisories and patch information. Affected products include: Grafana Tempo.

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Grafana	Tempo	< 2.10.3

Related Weaknesses (CWE)

CWE-326

References

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

FAQ

What is CVE-2026-28377?

CVE-2026-28377 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 d...

How severe is CVE-2026-28377?

CVE-2026-28377 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-28377?

Check the references section above for vendor advisories and patch information. Affected products include: Grafana Tempo.