MEDIUM
CVE-2026-40612
CWE-674Published: May 11, 2026· Updated: May 13, 2026
5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.9th
Official 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.
Technical Analysis
CVE-2026-40612 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Vendors & Products
jqlang1 product
jq
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (2)
→
https://github.com/jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69jExploit · Mitigation · Vendor Advisory
→
https://github.com/jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69jExploit · Mitigation · Vendor Advisory
Quick Facts
CVE IDCVE-2026-40612
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-674
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 11, 2026
Related CVEs (CWE-674)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-40612 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.