{"id":"CVE-2026-28377","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-28377","generatedAt":"2026-10-28T03:42:46.398Z","title":"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.","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.\n\nThanks to william_goodfellow for reporting this vulnerability.","published":"2026-03-26T22:16:28.000Z","lastModified":"2026-06-17T13:20:15.000Z","status":"Analyzed","sourceIdentifier":"security@grafana.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-326"],"affected":["grafana/tempo"],"epss":{"score":0.00161,"percentile":0.05239,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://grafana.com/security/security-advisories/cve-2026-28377","tags":["Vendor Advisory"],"source":"security@grafana.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-28377","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}