{"id":"CVE-2026-57449","revision":"7e215cd1f8944d6abadff9e00c93ed2a","records":[{"revision":"7e215cd1f8944d6abadff9e00c93ed2a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-57449","aliases":[],"title":"Actual Sync Server: CORS Proxy GitHub API Allowlist Prefix Bypass Leaks Private Repositories Through the Server GitHub Token","description":"Actual is a local-first personal finance tool. Prior to 26.7.0, Actual Sync Server's CORS proxy is intended to let authenticated users fetch resources only from repositories listed in the official plugin allowlist. When `ACTUAL_GITHUB_TOKEN` is configured, the proxy automatically attaches the server's GitHub token to GitHub requests. The GitHub API allowlist check uses a raw `startsWith()` prefix test for `/repos/{owner}/{repo}` without requiring a path boundary after the repository name. If an allowlisted public plugin repository is `https://github.com/acme/plugin`, the proxy also accepts GitHub API URLs. Those URLs are outside the allowlisted repository but still pass because their API path starts with `/repos/acme/plugin`. The proxy then forwards the request with the server's `ACTUAL_GITHUB_TOKEN`, allowing any authenticated Actual user to read private GitHub resources reachable by that token. Version 26.7.0 fixes the issue.","state":0,"publishedAt":"2026-09-25T22:10:39.706+00:00","modifiedAt":"2026-09-28T13:07:46.38+00:00","affected":[{"ecosystem":"Vendor product","name":"actual","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"actualbudget\",\n                    \"product\": \"actual\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 26.7.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/actualbudget/actual/security/advisories/GHSA-m62c-5q34-f3cf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57449","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-57449","identifiers":["CVE-2026-57449"]},"retained":false,"historicalAffected":[]}],"coverage":[]}