CVE-2026-27638
7.1 · HIGHOverview
CVE-2026-27638 is a high-severity vulnerability affecting actualbudget actual. It was published on February 26, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from actualbudget. Update actual to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| actualbudget | actual | >= 0, < 26.2.1 | Affected |
Frequently Asked Questions
What is CVE-2026-27638?
CVE-2026-27638 is a high-severity vulnerability affecting actualbudget actual. It was published on February 26, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2026-27638?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-27638?
Check the references section for vendor advisories and patches from actualbudget. Update actual to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-27638?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-27638 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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