CVE-2025-40928

7.5 highEPSS 0.7%

High (7.5). EPSS 0.7% chance of exploitation in the next 30 days.

JSON::XS before version 4.04 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
CWE: CWE-122
Published: 2025-09-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://metacpan.org/release/MLEHMANN/JSON-XS-4.03/source/XS.xs#L256
https://security.metacpan.org/patches/J/JSON-XS/4.03/CVE-2025-40928-r1.patch
http://www.openwall.com/lists/oss-security/2025/09/08/2
https://lists.debian.org/debian-lts-announce/2025/09/msg00033.html

Check your stack JSON