PT-2026-22202 · Actual · Actual

Q1Uf3Ng · Published 2026-02-26 · Updated 2026-03-25 · CVE-2026-27638

Positive Technologies · (AI Summary)

CVSS v4.0

7.1

High

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Actual versions prior to 26.2.1

Description A flaw exists in Actual, a personal finance tool, where the sync API endpoints do not properly verify user access permissions in multi-user mode (OpenID). This allows any authenticated user to read, modify, and overwrite budget files belonging to other users by providing the file ID. The affected API endpoints are /sync/*. The vulnerable parameter is the file ID.

Recommendations Update to version 26.2.1 or later.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-27638

GHSA-QMJJ-P7M9-WJRV

Affected Products

Actual

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27638.json · Exploit
• https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08 · Patch
• https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-qmjj-p7m9-wjrv · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-27638 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27638 · Security Note
• https://github.com/actualbudget/actual · Note
• https://github.com/actualbudget/actual/releases/tag/v26.2.1 · Note
• https://twitter.com/CVEnew/status/2027466643891491239 · Twitter Post
• https://twitter.com/cracbot/status/2028787693594071322 · Twitter Post
• https://twitter.com/q1uf3ng/status/2036824777642655889 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2027216173016719384 · Twitter Post
• https://twitter.com/_cvereports/status/2027468824476311934 · Twitter Post