{"answers":{"affected":"2 open source packages ship an affected version, including @better-auth/sso. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-53513 in the wild and no public exploit code.","fix":"Upgrade @better-auth/sso to 1.6.11 or later.","what":"CVE-2026-53513 is a critical server-side request forgery vulnerability in @better-auth better-auth, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53513 and fix it if it is affected.\n\nWhat it is: CVE-2026-53513 is a critical server-side request forgery vulnerability in @better-auth better-auth, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-53513 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @better-auth/sso (npm): affected from 0.1.0; fixed in 1.6.11\n- @better-auth/sso (npm): affected from 0.1.0; fixed in 1.6.11\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-53513/ (Markdown: https://insights.sbomify.com/CVE-2026-53513/index.md)","id":"CVE-2026-53513","markdown":"https://insights.sbomify.com/CVE-2026-53513/index.md","name":"CVE-2026-53513","record":{"aliases":["GHSA-5rr4-8452-hf4v"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"TypeScript authentication library","requires_auth":"low_privilege","summary":"Attackers can exploit unvalidated OIDC endpoints in Better Auth's SSO plugin to perform server-side request forgery and potentially link accounts.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"better-auth\\/sso","vendor":"better-auth"},{"product":"better_auth","vendor":"better-auth"}],"cvss":{"score":9.6,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-441","name":"Unintended Proxy or Intermediary"},{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the @better-auth/sso plugin's POST /sso/register and POST /sso/update-provider endpoints accept attacker-controlled oidcConfig.userInfoEndpoint, tokenEndpoint, and jwksEndpoint URLs when skipDiscovery: true is set, store them on the ssoProvider row without origin validation, and fetch them during OIDC callback, allowing non-blind server-side request forgery and possible account linking when trustEmailVerified: true is configured. This issue is fixed in version 1.6.11.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration","id":"CVE-2026-53513","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Better Auth: Unauthorized invitation acceptance via unverified email match in organization plugin","id":"CVE-2026-53514"},"packages":[{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["0.1.0"],"last_affected":[],"package":"@better-auth/sso","purl":null,"source":"GHSA-5rr4-8452-hf4v"},{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["0.1.0"],"last_affected":[],"package":"@better-auth/sso","purl":"pkg:npm/%40better-auth/sso","source":"GHSA-5rr4-8452-hf4v"}],"prev":{"headline":"Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins","id":"CVE-2026-53512"},"products":["better-auth","sso"],"published":"2026-07-15","related":[{"cvss_score":7.1,"headline":"Better Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/sso","id":"CVE-2026-53515","kev_date_added":null,"published":"2026-07-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["@better-auth","better-auth"]},"summary":"Attackers can exploit unvalidated OIDC endpoints in Better Auth's SSO plugin to perform server-side request forgery and potentially link accounts.","url":"https://insights.sbomify.com/CVE-2026-53513/"}