{"cve":"CVE-2026-27638","nvd":{"published":"2026-02-26T23:16:34.807","modified":"2026-06-17T10:27:26.207","status":"Analyzed","description":"Actual is a local-first personal finance tool. Prior to version 26.2.1, in multi-user mode (OpenID), the sync API endpoints (`/sync/*`) don't verify that the authenticated user owns or has access to the file being operated on. Any authenticated user can read, modify, and overwrite any other user's budget files by providing their file ID. Version 26.2.1 patches the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","score":5.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","score":7.1},"cwes":["CWE-862"],"references":["https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08","https://github.com/actualbudget/actual/releases/tag/v26.2.1","https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv"],"products":["actualbudget:actual"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27638","score":0.00343,"percentile":0.27855,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qmjj-p7m9-wjrv","url":"https://osv.dev/vulnerability/GHSA-qmjj-p7m9-wjrv","summary":"@actual-app/sync-server: Missing authorization in sync endpoints allows cross-user budget file access in multi-user mode","modified":"2026-02-28T05:56:20.442461Z","packages":[{"ecosystem":"npm","name":"@actual-app/sync-server","purl":"pkg:npm/%40actual-app/sync-server","ranges":["<26.2.1"],"fixed":["26.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}