{"answers":{"affected":"2 open source packages ship an affected version, including @actual-app/sync-server. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27638 exists.","fix":"Upgrade @actual-app/sync-server to 26.2.1 or later.","what":"CVE-2026-27638 is a medium-severity missing authorization vulnerability in actualbudget actual, published on 26 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27638 and fix it if it is affected.\n\nWhat it is: CVE-2026-27638 is a medium-severity missing authorization vulnerability in actualbudget actual, published on 26 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27638 exists.\n\nAffected packages and fixed versions:\n- @actual-app/sync-server (npm): affected all versions; fixed in 26.2.1\n- @actual-app/sync-server (npm): affected all versions; fixed in 26.2.1\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-2026-27638/ (Markdown: https://insights.sbomify.com/CVE-2026-27638/index.md)","id":"CVE-2026-27638","markdown":"https://insights.sbomify.com/CVE-2026-27638/index.md","name":"CVE-2026-27638","record":{"aliases":["GHSA-qmjj-p7m9-wjrv"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"Personal finance tool","requires_auth":"low_privilege","summary":"In multi-user mode, authenticated users can access and modify other users' budget files due to missing ownership checks on sync endpoints.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"actual","vendor":"actualbudget"}],"cvss":{"score":5.7,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"ActualBudget missing authorization in sync endpoints allows cross-user budget file access in multi-user mode","id":"CVE-2026-27638","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Mercator vulnerable to stored XSS via unescaped Blade directives in display templates","id":"CVE-2026-27639"},"packages":[{"ecosystem":"npm","fixed":["26.2.1"],"introduced":["0"],"last_affected":[],"package":"@actual-app/sync-server","purl":null,"source":"GHSA-qmjj-p7m9-wjrv"},{"ecosystem":"npm","fixed":["26.2.1"],"introduced":["0"],"last_affected":[],"package":"@actual-app/sync-server","purl":"pkg:npm/%40actual-app/sync-server","source":"GHSA-qmjj-p7m9-wjrv"}],"prev":{"headline":"FreeScout's Predictable Authentication Token Enables Account Takeover","id":"CVE-2026-27637"},"products":["actual"],"published":"2026-02-26","related":[{"cvss_score":9.2,"headline":"ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints","id":"CVE-2026-27584","kev_date_added":null,"published":"2026-02-24"},{"cvss_score":8.8,"headline":"Actual has Privilege Escalation via 'change-password' Endpoint on OpenID-Migrated Servers","id":"CVE-2026-33318","kev_date_added":null,"published":"2026-04-24"},{"cvss_score":5.3,"headline":"Actual Sync Server 26.2.1 - Authenticated Path Traversal","id":"CVE-2026-3089","kev_date_added":null,"published":"2026-03-09"}],"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-02","vendors":["actualbudget"]},"summary":"In multi-user mode, authenticated users can access and modify other users' budget files due to missing ownership checks on sync endpoints.","url":"https://insights.sbomify.com/CVE-2026-27638/"}