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GHSA-FFQX-Q65F-36JF

Vulnerability from github – Published: 2026-03-27 00:31 – Updated: 2026-07-21 14:00
VLAI
Summary
Grafana Tempo has Inadequate Encryption Strength
Details

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.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/tempo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-28377"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-326"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T04:07:51Z",
    "nvd_published_at": "2026-03-26T22:16:28Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-ffqx-q65f-36jf",
  "modified": "2026-07-21T14:00:17Z",
  "published": "2026-03-27T00:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28377"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/tempo/commit/bb8ca663db34a0980c9758b40d918fda3b4dbec3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-ffqx-q65f-36jf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/grafana/tempo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/CHANGELOG.md?plain=1#L135"
    },
    {
      "type": "WEB",
      "url": "https://grafana.com/security/security-advisories/cve-2026-28377"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Grafana Tempo has Inadequate Encryption Strength"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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