CVE-2026-28377

{"id": "CVE-2026-28377", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@grafana.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-03-26T22:16:28.460", "references": [{"url": "https://grafana.com/security/security-advisories/cve-2026-28377", "tags": ["Vendor Advisory"], "source": "security@grafana.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-326"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Una vulnerabilidad en Grafana Tempo expone la clave de cifrado S3 SSE-C en texto plano a trav\u00e9s del endpoint /status/config, lo que podr\u00eda permitir a usuarios no autorizados obtener la clave utilizada para cifrar los datos de traza almacenados en S3.\n\nGracias a william_goodfellow por informar sobre esta vulnerabilidad."}], "lastModified": "2026-03-31T19:00:15.610", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1FEA69C-8014-4D65-AFA0-5C44DF250663", "versionEndExcluding": "2.10.3"}], "operator": "OR"}]}], "sourceIdentifier": "security@grafana.com"}