{"id":"CVE-2026-30762","aliases":["GHSA-mcww-4hxq-hfr3","PYSEC-2026-2593"],"title":"LightRAG: Hardcoded JWT Signing Secret Allows Authentication Bypass","summary":"LightRAG: Hardcoded JWT Signing Secret Allows Authentication Bypass","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":"lightrag-hku","product":"lightrag-hku","ecosystem":"pip","affected":["lightrag-hku < 1.4.13"],"patched":["lightrag-hku 1.4.13"],"published":"2026-04-04","updated":"2026-07-13","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-mcww-4hxq-hfr3","references":[{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-mcww-4hxq-hfr3"},{"url":"https://github.com/HKUDS/LightRAG"}],"tags":["osv","pip"],"ingestedAt":"2026-07-13T18:58:00.588Z","slug":"CVE-2026-30762","body":"## Overview\n\nSubject: Security Vulnerability Report Hardcoded JWT Secret (CVE-2026-30762)\n\nHi HKUDS team,\n\nI'm writing to report a security vulnerability I discovered in LightRAG v1.4.10. This has been assigned CVE-2026-30762 by MITRE.\n\nVulnerability: Hardcoded JWT signing secret\nType: Improper Authentication (CWE-287)\nSeverity: High\nAttack Vector: Remote / Unauthenticated\n\nSummary:\nThe file lightrag/api/config.py (line 397) uses a default JWT secret \"lightrag-jwt-default-secret\" when the TOKEN_SECRET environment variable is not set. The AuthHandler in lightrag/api/auth.py (lines 24-25) uses this secret to sign and verify tokens. An unauthenticated attacker can forge valid JWT tokens using the publicly known default secret and gain access to any protected endpoint.\n\nReproduction:\n1. Install LightRAG v1.4.10 with AUTH_ACCOUNTS configured but no TOKEN_SECRET set\n2. Use PyJWT to sign a token: jwt.encode({\"sub\": \"admin\", \"role\": \"user\"}, \"lightrag-jwt-default-secret\", algorithm=\"HS256\")\n3. Send a request to any protected endpoint with the header: Authorization: Bearer <forged_token>\n4. Access is granted without valid credentials\n\nSuggested Fix:\nRequire TOKEN_SECRET to be explicitly set when AUTH_ACCOUNTS is configured. Refuse to start the API server if authentication is enabled but no custom secret is provided.\n\nI'm following a 90-day responsible disclosure timeline from today's date. Please let me know if you have any questions or need additional information.\n\nBest regards,\nVenkata Avinash Taduturi\n\n## Affected packages\n\n- `lightrag-hku < 1.4.13`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `lightrag-hku 1.4.13`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}