CVE-2026-40612

MEDIUM

jq: Stack overflow via unbounded recursion in jv_contains

Title source: cna
STIX 2.1

Description

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 depth 10000), the C stack is exhausted.

References (1)

Core 1
Core References

Scores

CVSS v3 5.5
EPSS 0.0016
EPSS Percentile 5.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-674
Status published
Products (2)
jqlang/jq < 1.8.1
jqlang/jq <= 1.8.1
Published May 11, 2026
Tracked Since May 11, 2026