CVE-2026-28377Disclosure(grafana / tempo)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

grafana CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

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

Weakness type (CWE)

CWE-326

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

tempo

Threat summary

4 mentions across 3 observed days
Momentum state: stable

What's happening

Technical details provided in 3 signals
Disclosure: 4 classified signals
Peaked 1d ago at 2 mentions (2026-03-27); latest day: 1
4 total mentions across 3 days

Affected systems

Vendors

grafana

Products

tempo

Deep dive

Activity timeline4 mentions / 3d

Signal classification1 categories

Disclosure

4100.0%

Referenced assets4 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-20	1	Disclosure1
2026-03-27	2	Disclosure2
2026-04-07	1	Disclosure1

Full discourse4 posts

dbugs@ptdbugs197d
Disclosure
S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern) CVE: CVE-2026-28377 PT-Identifier: PT-2026-26315 Vendor: Grafana Product: Tempo CVSS: 7.5 Credits: n/a 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. References: • https://dbugs.ptsecurity.com/vulnerability/CVE-2026-28377 • https://grafana.com/security/security-advisories/cve-2026-28377
Post summary
Grafana Tempo’s /status/config endpoint leaks S3 SSE‑C encryption keys; no exploit, mitigation, or active exploitation details are provided.
01001290
781 followersView on X
Red Hornet Intel@RedHornet_Intel185d
Disclosure
CVE-2026-28377 In Grafana Tempo, S3 SSE-C encryption key exposed in plaintext via /status/config endpoint, allowing unauth users to obtain key for trace data. Severity: High PoC: n/a Exploited: n/a Product: grafana:tempo
Post summary
CVE-2026-28377 is a newly disclosed high‑severity vulnerability in Grafana Tempo that exposes S3 SSE‑C encryption keys via the /status/config endpoint, allowing unauthenticated access to trace data.
000007
1 followersView on X
CVE@CVEnew196d
Disclosure
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 obta… https://www.cve.org/CVERecord?id=CVE-2026-28377
Post summary
The post announces a new Grafana Tempo vulnerability, CVE‑2026‑28377, noting that it leaks S3 SSE‑C encryption keys via the /status/config endpoint and provides a link to the official CVE record.
00000141
56.9K followersView on X
CERT-PY@CERTpy203d
Disclosure
⚠️ Vulnerabilidad en productos Grafana ❗ CVE-2026-28377 ➡️ Más info: https://www.cert.gov.py/vulnerabilidad-en-productos-grafana-2/ https://t.co/ojluOW7pe1
Post summary
A brief announcement of a new vulnerability in Grafana products (CVE-2026-28377) with links to additional information.
00000108
6.6K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	grafana	tempo	-	-	-

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What researchers are saying

CVE-2026-28377

dbugs[verified]@ptdbugsDisclosure

Grafana Tempo’s /status/config endpoint leaks S3 SSE‑C encryption keys; no exploit, mitigation, or active exploitation details are provided.

Red Hornet Intel[verified]@RedHornet_IntelDisclosure

CVE-2026-28377 is a newly disclosed high‑severity vulnerability in Grafana Tempo that exposes S3 SSE‑C encryption keys via the /status/config endpoint, allowing unauthenticated access to trace data.

CVE@CVEnewDisclosure

The post announces a new Grafana Tempo vulnerability, CVE‑2026‑28377, noting that it leaks S3 SSE‑C encryption keys via the /status/config endpoint and provides a link to the official CVE record.

CERT-PY@CERTpyDisclosure

A brief announcement of a new vulnerability in Grafana products (CVE-2026-28377) with links to additional information.