{"id":"DEBIAN-CVE-2026-47770","details":"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.","modified":"2026-09-01T16:06:47.443583781Z","published":"2026-06-25T18:16:38.080Z","upstream":["CVE-2026-47770"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-47770"}],"affected":[{"package":{"name":"jq","ecosystem":"Debian:12","purl":"pkg:deb/debian/jq?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6-2.1+deb12u2"}]}],"versions":["1.6-2.1","1.6-2.1+deb12u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47770.json"}},{"package":{"name":"jq","ecosystem":"Debian:13","purl":"pkg:deb/debian/jq?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.1-6+deb13u3"}]}],"versions":["1.7.1-6+deb13u1","1.7.1-6+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47770.json"}},{"package":{"name":"jq","ecosystem":"Debian:14","purl":"pkg:deb/debian/jq?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1-7"}]}],"versions":["1.8.0-1","1.8.1-1","1.8.1-2","1.8.1-3","1.8.1-4","1.8.1-5","1.8.1-6"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47770.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}