CVE-2026-40612— jq: Stack overflow via unbounded recursion in jv_contains
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-40612
Vulnerability Information
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Vulnerability Title
jq: Stack overflow via unbounded recursion in jv_contains
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
jq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jq是jqlang开源的一个轻量级且灵活的命令行 JSON 处理器。 jq 1.8.1及之前版本存在安全漏洞，该漏洞源于jv_contains函数递归嵌套数组/对象时无深度限制，可能导致C栈耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40612
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- https://github.com/jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69jx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-40612
Same Patch Batch · jqlang · 2026-05-11 · 7 CVEs total
| CVE-2026-43896 | 6.2 MEDIUM | jq: Stack Overflow in Recursive Object Merge |
| CVE-2026-43894 | 6.2 MEDIUM | jq: Wild stack write via signed-integer overflow in decNumber D2U() macro |
| CVE-2026-41256 | 5.5 MEDIUM | jq: Embedded NUL truncates top-level jq programs loaded with -f |
| CVE-2026-43895 | 4.4 MEDIUM | jq: Embedded NUL in jq import paths causes local redaction-policy bypass and preserves sen |
| CVE-2026-41257 | jq: Signed-int overflow in `stack_reallocate` (jq VM stack) | |
| CVE-2026-44777 | jq: stack overflow in module loading on mutual `include` |
IV. Related Vulnerabilities
Same product: jq
- CVE-2026-43896
jq: Stack Overflow in Recursive Object Merge - CVE-2026-43895
jq: Embedded NUL in jq import paths causes local redaction-p - CVE-2026-44777
jq: stack overflow in module loading on mutual `include` - CVE-2026-43894
jq: Wild stack write via signed-integer overflow in decNumbe - CVE-2026-41256
jq: Embedded NUL truncates top-level jq programs loaded with
Same vendor: jqlang
- CVE-2026-43896
jq: Stack Overflow in Recursive Object Merge - CVE-2026-43895
jq: Embedded NUL in jq import paths causes local redaction-p - CVE-2026-44777
jq: stack overflow in module loading on mutual `include` - CVE-2026-43894
jq: Wild stack write via signed-integer overflow in decNumbe - CVE-2026-41256
jq: Embedded NUL truncates top-level jq programs loaded with
V. Comments for CVE-2026-40612
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