jq: Stack overflow via unbounded recursion in jv_contains_CVE-2026-40612

5.4 / 10

MEDIUM

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

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.

Basic Information

ID CVE-2026-40612

Source GitHub_M

Published May 11, 2026 at 17:16

Modified May 11, 2026 at 18:23

Affected Product

Vendor jqlang

Product jq

Version <= 1.8.1

Affected Versions jqlang jq <= 1.8.1

CWE Classification

CWE-674

References

github.com /jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69j

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