Vulnerability · Published Sep 8, 2025 · Assigned by CPANSec
CVE-2025-40930JSON::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
High 7.5
In plain English
A high-severity heap buffer overflow in JSON::SIMD from PJUHASZ. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 46.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PJUHASZ | JSON::SIMD | 0 – before 1.07 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://metacpan.org/release/PJUHASZ/JSON-SIMD-1.06/source/SIMD.xs#L248 related
- https://metacpan.org/release/PJUHASZ/JSON-SIMD-1.07/changes release-notes
- https://github.com/pjuhasz/JSON-SIMD/commit/9a87de7331c9fa5198cae404a83b17649cf7b918.patch patch
- http://www.openwall.com/lists/oss-security/2025/09/08/3