CVE-2026-55773

描述

### Summary CedarJava is an open source Java implementation of the Cedar policy language, used for fine-grained authorization decisions. Under certain circumstances, improper input handling could allow policy injection. ### Impact **Cedar-expression injection via unescaped `toCedarExpr()`** The `toCedarExpr()` method on Cedar Value types does not escape special characters (`"` or `\`) when converting values to Cedar source code. If an integrator uses `toCedarExpr()` to build policy text at runtime from user-controlled values, an actor could inject arbitrary Cedar expressions. For example, injecting `|| true` into a `permit ... when { ... }` clause could make the permit unconditional, or injecting `&& false` into a `forbid` clause could prevent the `forbid` from triggering. This issue requires the integrator to use `toCedarExpr()` to build policy text at runtime from user-controlled input. ### Impacted versions: < 4.9 ### Patches Addressed in CedarJava version 2.3.6, 3.4.1, and 4.9 and above. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes. ### Workarounds Validate and sanitize all user-supplied input before passing it to `toCedarExpr()`. Avoid building policy text at runtime from user-controlled values. ### References If you have any questions or comments about this advisory, we ask that you contact us directly via email to [[email protected]](mailto:[email protected]). Please do not create a public GitHub issue.

如何修補 CVE-2026-55773

要修補 CVE-2026-55773,請將受影響套件升級到下列已修補版本。

• —升級至 2.3.6 或更新版本

CVE-2026-55773 正在被利用嗎?

目前沒有被利用訊號。CVE-2026-55773 既不在 CISA KEV 也沒有最新的 EPSS 分數。

受影響套件(1)

• from 0, < 2.3.6