CVE-2025-40930

HIGHNVD 7.57.5—Elevated

7.5

JSON::SIMD before version 1.07 and earlier for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 37.6%
KEV: Not listed

Published

September 8, 2025

Last Modified

April 15, 2026

References (4)

9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/pjuhasz/JSON-SIMD/commit/9a87de7331c9fa5198cae404a83b17649cf7b918.patch
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/release/PJUHASZ/JSON-SIMD-1.06/source/SIMD.xs#L248
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/release/PJUHASZ/JSON-SIMD-1.07/changes
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/09/08/3

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-122Heap-based Buffer Overflow

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:10 UTCepss_batch
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2026-06-02 16:02 UTCOSV refresh
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Frequently asked(5)

What is CVE-2025-40930?

CVE-2025-40930 is a high vulnerability published on September 8, 2025. JSON::SIMD before version 1.07 and earlier for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact.

When was CVE-2025-40930 disclosed?

CVE-2025-40930 was first published in the National Vulnerability Database on September 8, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-40930 actively exploited?

CVE-2025-40930 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-40930?

CVE-2025-40930 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2025-40930?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40930, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-40930

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-40930?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

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