{"affected":[{"product":"chartbrew","source":"CNA: GitHub_M","vendor":"chartbrew","versions":[{"status":"affected","version":"< 5.2.3"}]}],"cveId":"CVE-2026-85295","cwes":["CWE-1394"],"description":"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, four authentication helpers accepted session tokens signed with CB_SECRET, including known, weak, or shipped-default values. The vulnerable surface is session JWT fallback in server/modules/verifyToken.js, verifyUser.js, getUserFromToken.js, and socketManager.js across the API and socket layer. A stock source or repository Docker Compose deployment retains a known, weak, or default CB_SECRET and an attacker submits a forged HS256 token decoding to a target user id. Knowing the symmetric secret lets the attacker create a token that the legacy verification fallback accepts as the target user without that user's password or two-factor authentication. The condition includes stock source and repository Docker Compose installs and any otherwise known or weak CB_SECRET; a bare container where CB_SECRET is undefined is not affected by this fallback path. A forged session impersonates the chosen user across the entire API and socket layer and exercises that user's Chartbrew privileges. This issue is fixed in version 5.2.3.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.8,"severity":"critical","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793999131286,"publishedAt":1793999131286,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/chartbrew/chartbrew/security/advisories/GHSA-qvv4-r3q6-8797"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/chartbrew/chartbrew/commit/da8c71f156aaa13fbc7ead15a4726740fef2b3c5"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3"}],"remediation":[],"revision":"35085eeea72dd023b71a702cdc3442869f933627292e0c352880c9df45c4925f","sources":[{"modifiedAt":1793999131286,"name":"CNA: GitHub_M","retrievedAt":1794002943030,"url":"https://www.cve.org/CVERecord?id=CVE-2026-85295"}],"ssvc":null,"status":"published","title":"Chartbrew: Full account takeover via JWTs accepted under default CB_SECRET","updatedAt":1794002943030}