CVE-2025-40930 Integer overflow in JSON::SIMD
An integer buffer overflow in the JSON::SIMD Perl library allows attackers to cause a denial of service via crafted JSON input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40930?
CVE-2025-40930 is a high-severity vulnerability in PJUHASZ JSON::SIMD, published on 8 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-122
Which versions are affected by CVE-2025-40930?
How do I fix CVE-2025-40930?
No fix has been published for CVE-2025-40930 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-40930 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-40930 exists.
Sources
Also known as GHSA-9pm2-v7x2-9mw5.