What is CVE-2026-40612?

CVE-2026-40612 is a medium-severity vulnerability in Jqlang Jq, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2026-05-11.

How severe is CVE-2026-40612?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Jqlang Jq

CVE-2026-40612

jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at d…

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Jqlang Jq — versions <= 1.8.1

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40612?: CVE-2026-40612 is a medium-severity vulnerability in Jqlang Jq, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2026-05-11.
How severe is CVE-2026-40612?: Medium severity. CVSS v3 base score is 5.5 out of 10.