{"cve":"CVE-2026-28377","nvd":{"published":"2026-03-26T22:16:28.460","modified":"2026-06-17T13:20:14.760","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-326"],"references":["https://grafana.com/security/security-advisories/cve-2026-28377"],"products":["grafana:tempo"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-28377","score":0.00161,"percentile":0.05266,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-ffqx-q65f-36jf","url":"https://osv.dev/vulnerability/GHSA-ffqx-q65f-36jf","summary":"Grafana Tempo has Inadequate Encryption Strength","modified":"2026-09-10T03:51:00.288444154Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":["<2.10.3"],"fixed":["2.10.3"]}]},{"id":"GO-2026-5359","url":"https://osv.dev/vulnerability/GO-2026-5359","summary":"Grafana Tempo has Inadequate Encryption Strength in github.com/grafana/tempo","modified":"2026-07-09T12:44:26.870919557Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}