jq: Stack overflow via unbounded recursion in jv_contains
CVE-2026-40612 is fixed in jq on 1 platform, first by DEBIAN-CVE-2026-40612, released May 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| jq · Debian 13.5 (trixie) | 1.7.1-6+deb13u3 | DEBIAN-CVE-2026-40612 | May 27, 2026 |
| jq · Debian 14 | 1.8.1-6 | DEBIAN-CVE-2026-40612 | May 27, 2026 |
| jq · opensuse-leap 16.0 | 1.7.1-160000.3.1 | OPENSUSE-SU-2026:21248-1 | Jul 7, 2026 |
| jq · sles 15.6 | 1.7.1-150000.3.25.1 | SUSE-SU-2026:4275-1 | Sep 21, 2026 |
| jq · sles 15.7 | 1.7.1-150000.3.25.1 | SUSE-SU-2026:4275-1 | Sep 21, 2026 |
| jq · sles 16.0 | 1.7.1-160000.3.1 | SUSE-SU-2026:22566-1 | Jul 7, 2026 |
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