Arbitrary Code Injection Affecting com.cedarpolicy:cedar-java package, versions [,2.3.6)[3.1.2,3.4.1)[4.0.0,4.9.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Arbitrary Code Injection vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JAVA-COMCEDARPOLICY-17732795
- published30 Jun 2026
- disclosed19 Jun 2026
- creditUnknown
Introduced: 19 Jun 2026
CVE-2026-55773 (opens in a new tab)How to fix?
Upgrade com.cedarpolicy:cedar-java to version 2.3.6, 3.4.1, 4.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the toCedarExpr method, which does not escape special characters when converting values to source code. An attacker can inject arbitrary expressions by supplying specially crafted input, potentially altering authorization logic or bypassing intended restrictions. This is only exploitable if user-controlled input is used to build policy text at runtime through toCedarExpr.
Workaround
This vulnerability can be mitigated by validating and sanitizing all user-supplied input before passing it to toCedarExpr, and by avoiding the construction of policy text at runtime from user-controlled values.