Summary
Angular Expressions - Remote Code Execution using filters
Vulnerable versions :
angular-expressions <= 1.5.1
Credits
Credits go to San Gil from www.securityoffice.io who has found the issue and reported it to us.
Impact
An attacker can write a malicious expression that escapes the sandbox to execute arbitrary code on the system.
Example of vulnerable code:
const expressions = require("angular-expressions");
const result = expressions.compile("a | __proto__")({}, {});
This should throw the error : Filter 'proto' is not defined, however, this shows :
Uncaught SyntaxError: Unexpected identifier 'Object'
With a more complex (undisclosed) payload, one can get full access to Arbitrary code execution on the system.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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The problem has been patched in version 1.5.2 of angular-expressions.
Frequently Asked Questions
- What is CVE-2026-44643? CVE-2026-44643 is a critical-severity security vulnerability in angular-expressions (npm), affecting versions <= 1.5.1. It is fixed in 1.5.2.
- Which versions of angular-expressions are affected by CVE-2026-44643? angular-expressions (npm) versions <= 1.5.1 is affected.
- Is there a fix for CVE-2026-44643? Yes. CVE-2026-44643 is fixed in 1.5.2. Upgrade to this version or later.
- Is CVE-2026-44643 exploitable, and should I be worried? Whether CVE-2026-44643 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-44643 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-44643? Upgrade
angular-expressionsto 1.5.2 or later.