Arbitrary Code Injection Affecting org.antlr:antlr4 package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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.
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- published1 Jul 2026
- disclosed28 Jun 2026
- creditjiazhou
Introduced: 28 Jun 2026
CVE-2026-13500 (opens in a new tab)How to fix?
There is no fixed version for org.antlr:antlr4.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the Grammar Action Block Handler process in OutputFile.java. An attacker can execute arbitrary code by providing crafted input to the affected component.