{"action":"Upgrade better-auth to 1.6.11 or later.","affected":[{"fixed":"1.6.11","introduced":"0"}],"component":"better-auth","cve_ids":["CVE-2026-53518"],"ecosystem":"npm","epss":0.00409,"exploited":false,"fixed_versions":["1.6.11"],"ghsa_id":"GHSA-7w99-5wm4-3g79","id":"tcs_01M5KFB28RR73BJZ2M34GQF8JE","modified_at":"2026-07-20T19:30:24.125273382Z","published_at":"2026-07-07T20:56:35Z","references":["https://osv.dev/vulnerability/GHSA-7w99-5wm4-3g79","https://github.com/better-auth/better-auth/security/advisories/GHSA-7w99-5wm4-3g79","https://nvd.nist.gov/vuln/detail/CVE-2026-53518","https://github.com/better-auth/better-auth/commit/b4bc65a007784b2eb0efb459e5fa6fd8055d3ec9","https://github.com/better-auth/better-auth","https://github.com/better-auth/better-auth/releases/tag/v1.6.11"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GHSA-7w99-5wm4-3g79#npm/better-auth","url":"https://osv.dev/vulnerability/GHSA-7w99-5wm4-3g79"}],"summary":"@better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive"}