CVE catalog

CVE-2026-13502

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

[CVE catalog]

Severity: Low · CVSS 1.1CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Jun 28, 2026, 3:16:53 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.11% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	antlr4	sid	`4.9.2-3`	unknown
Debian	antlr4	forky	`4.9.2-3`	unknown
Debian	antlr4	trixie	`4.9.2-3`	unknown
Debian	antlr4	bookworm	`4.7.2-5`	unknown
Cpe	antlr4	Not reported	Not reported	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	antlr4	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	antlr4	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	antlr4	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	antlr4	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[antlr4]Affected
Details (2)
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
[antlr4-doc]Affected
Source package: [antlr4]
Details (2)
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
[antlr4-maven-plugin]Affected
Source package: [antlr4]
Details (2)
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
[libantlr4-runtime-java]Affected
Source package: [antlr4]
Details (2)
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12
- 4.7.2-5 · all · bookworm
  Affected
  nvd · antlr4 · debian · bookworm; nvd · antlr4 · debian · 12

[Debian 13 (Trixie)]

[antlr4]Affected
Details (2)
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
[antlr4-doc]Affected
Source package: [antlr4]
Details (2)
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
[antlr4-maven-plugin]Affected
Source package: [antlr4]
Details (2)
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
[libantlr4-runtime-java]Affected
Source package: [antlr4]
Details (2)
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13
- 4.9.2-3 · all · trixie
  Affected
  nvd · antlr4 · debian · 13

Observed: Oct 23, 2026, 9:45:22 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]