Threat Intelligence / CVE / CVE-2026-13502

CVE-2026-13502

CVSS 4.5 (MEDIUM) · EPSS 0.1% · Priority 4.8/10 · Published 2026-06-28

As of 2026-06-29, CVE-2026-13502 is a CVSS 4.5 (MEDIUM-severity) vulnerability. EPSS exploitation probability 0.1%. Threadlinqs Intelligence tracks 0 threats exploiting it.

Last updated: 2026-06-29

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.

CVSS v3 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

Weaknesses (CWE)

CWE-367, CWE-362

References

Full detection coverage & IOCs for threats exploiting CVE-2026-13502 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.