CVE-2026-47770
Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
25/06/2026
Last modified:
26/06/2026
Description
jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2.
Impact
Base Score 4.0
6.80
Severity 4.0
MEDIUM
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:* | 1.8.2 (excluding) |
To consult the complete list of CPE names with products and versions, see this page