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.
Published: 2026-06-28
Score: 2 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Advisories

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History

Sun, 28 Jun 2026 15:15:00 +0000

Type Values Removed Values Added
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.
Title antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou
First Time appeared Antlr
Antlr antlr4
Weaknesses CWE-362
CWE-367
CPEs cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*
Vendors & Products Antlr
Antlr antlr4
References
Metrics cvssV2_0

{'score': 3.5, 'vector': 'AV:L/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 4.5, 'vector': 'CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 4.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 2, 'vector': 'CVSS: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'}

Subscriptions

Antlr Antlr4
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-06-28T14:45:07.057Z

Reserved: 2026-06-27T18:28:04.377Z

Link: CVE-2026-13502

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-28T16:30:17Z

Weaknesses