TI-2025-27321 Aliases CVE-2025-40930 GHSA-9pm2-v7x2-9mw5

Heap-based buffer overflow in PJUHASZ JSON::SIMD

HIGH 66CWE-122Published 2025-09-08 · Updated 2025-11-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00708 53rd percentileScored 2026-11-07

Fix Fixed JSON::SIMD (PJUHASZ): 1.07

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
PJUHASZ	JSON::SIMD	before 1.07	1.07	Patch available	CNA

JSON::SIMD VendorPJUHASZ Affected before 1.07 Fixed in 1.07 Patch available CNA

Remediation

Fix · CNA JSON::SIMD (PJUHASZ) Fixed in 1.07

Timeline

2026-10-02 Threatist record created from CVE-2025-40930
2026-10-03 Alias added: GHSA-9pm2-v7x2-9mw5

References

Patch 1

https://github.com/pjuhasz/JSON-SIMD/commit/9a87de7331c9fa5198cae404a83b17649cf7b918.patch

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences