Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-40612— jq: Stack overflow via unbounded recursion in jv_contains

Quick assessment

Affected
jqlang jq
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 7.5 Difficulty: Easy EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
jqlang jq <= 1.8.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-40612

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
jq: Stack overflow via unbounded recursion in jv_contains
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
jqlang jq <= 1.8.1 -

II. Public POCs for CVE-2026-40612

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-40612

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-40612 (1)

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
Same vendor: jqlang
Same weakness: CWE-674

V. Comments for CVE-2026-40612

No comments yet

Leave a comment