Description
A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public 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-374497 | antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal vdb-entry technical-description
- VDB-374497 | CTI Indicators (IOB, IOC, TTP, IOA) signature permissions-required
- CVE-2026-13503 | CVE Analysis and Report third-party-advisory
- Submit #838686 | antlr ANTLR4 4.13.2 Path Traversal tokenVocab File Read third-party-advisory
- https://github.com/wooyun123/wooyun/issues/8 exploit issue-tracking