Description
A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream.readObject of the file antlr4-maven-plugin/src/main/java/org/antlr/mojo/antlr4/GrammarDependencies.java of the component Maven Plugin. This manipulation causes time-of-check time-of-use. The attack is restricted to local execution. A high degree of complexity is needed for the attack. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| antlr | ANTLR4 | 4.13.0, 4.13.1, 4.13.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | antlr4 | No fix yet | — |
| Debian 13 | antlr4 | No fix yet | — |
| Debian 12 | antlr4 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | antlr4 | No fix yet | — |
| Ubuntu 26.04 LTS | antlr4 | No fix yet | — |
| Ubuntu 25.10 | antlr4 | No fix yet | — |
| Ubuntu 24.04 LTS | antlr4 | No fix yet | — |
| Ubuntu 22.04 LTS | antlr4 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | antlr4 | No fix yet | — |
| Ubuntu 18.04 LTS | antlr4 | No fix yet | — |
| Ubuntu 16.04 LTS | antlr4 | No fix yet | — |
References
- VDB-374498 | antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou vdb-entry technical-description
- VDB-374498 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-13502 | CVE Analysis and Report third-party-advisory
- Submit #838685 | antlr ANTLR4 4.13.2 Unsafe Java Deserialization Maven Plugin third-party-advisory
- https://github.com/wooyun123/wooyun/issues/7 exploit issue-tracking