{"id":"CVE-2026-28377","aliases":["GHSA-ffqx-q65f-36jf","GO-2026-5359"],"title":"Grafana Tempo has Inadequate Encryption Strength","summary":"Grafana Tempo has Inadequate Encryption Strength","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","vendor":"grafana","product":"github.com/grafana/tempo","ecosystem":"go","affected":["github.com/grafana/tempo < 2.10.3"],"patched":["github.com/grafana/tempo 2.10.3"],"published":"2026-03-27","updated":"2026-07-09","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-ffqx-q65f-36jf","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28377"},{"url":"https://github.com/grafana/tempo/commit/bb8ca663db34a0980c9758b40d918fda3b4dbec3"},{"url":"https://github.com/grafana/tempo"},{"url":"https://github.com/grafana/tempo/blob/4dc3e5b0d3463a0b67498b662b85a148698b4afd/CHANGELOG.md?plain=1#L135"},{"url":"https://grafana.com/security/security-advisories/cve-2026-28377"}],"tags":["osv","go"],"epss":0.00164,"epssPercentile":0.04931,"ingestedAt":"2026-07-09T18:56:36.347Z","slug":"CVE-2026-28377","body":"## Overview\n\nA 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\nGrafana thanks william_goodfellow for reporting this vulnerability.\n\n## Affected packages\n\n- `github.com/grafana/tempo < 2.10.3`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/grafana/tempo 2.10.3`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}