{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85708","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-04T14:45:10.647Z","datePublished":"2026-11-06T21:06:25.700Z","dateUpdated":"2026-11-06T21:06:25.700Z"},"containers":{"cna":{"title":"Chartbrew: Private chart data disclosure via forgeable CB_SECRET share tokens","problemTypes":[{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/chartbrew/chartbrew/security/advisories/GHSA-3chp-cr6f-hp63","tags":["x_refsource_CONFIRM"],"url":"https://github.com/chartbrew/chartbrew/security/advisories/GHSA-3chp-cr6f-hp63"},{"name":"https://github.com/chartbrew/chartbrew/commit/07fff78db39e1c073a0301ac382c565268824e09","tags":["x_refsource_MISC"],"url":"https://github.com/chartbrew/chartbrew/commit/07fff78db39e1c073a0301ac382c565268824e09"},{"name":"https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3","tags":["x_refsource_MISC"],"url":"https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3"}],"affected":[{"vendor":"chartbrew","product":"chartbrew","versions":[{"version":"< 5.2.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-06T21:06:25.700Z"},"descriptions":[{"lang":"en","value":"Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to 5.2.3, Chart share and embed tokens were signed with CB_SECRET, including known or shipped-default values in stock source and repository Docker Compose installs. The vulnerable surface is chart share-token verification and filter-access routes for private charts. An attacker who knows the deployment's CB_SECRET targets a private chart that has been shared at least once so a share-policy row exists, then forges a Chart-subject token for that chart id. The known signing key permits valid Chart tokens, and the filter-access path accepts sequential integer ids without requiring a legitimate share link; token expiry and revocation are ineffective once the secret is known. The condition requires a known or default secret and an existing share-policy row. A bare container where CB_SECRET is undefined is outside this path, and a unique secret excludes it only while the value remains unknown and unpredictable. An unauthenticated attacker can enumerate integer ids and read arbitrary private chart data, including chartData, without possessing a legitimate share link. This issue is fixed in version 5.2.3."}],"source":{"advisory":"GHSA-3chp-cr6f-hp63","discovery":"UNKNOWN"}}}}