CVE-2026-43896— jq: Stack Overflow in Recursive Object Merge
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-43896
Vulnerability Information
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Vulnerability Title
jq: Stack Overflow in Recursive Object Merge
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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_object_merge_recursive()中的无界递归允许特制jq程序以段错误崩溃进程，该函数通过*运算符在两个操作数均为对象时可达。
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-2026-43896
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- https://github.com/jqlang/jq/security/advisories/GHSA-mg96-6h3q-g846x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-43896
Same Patch Batch · jqlang · 2026-05-11 · 7 CVEs total
| 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-2026-40612 | jq: Stack overflow via unbounded recursion in jv_contains | |
| CVE-2026-44777 | jq: stack overflow in module loading on mutual `include` |
IV. Related Vulnerabilities
Same product: jq
- 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 - CVE-2026-40612
jq: Stack overflow via unbounded recursion in jv_contains
Same vendor: jqlang
- 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 - CVE-2026-40612
jq: Stack overflow via unbounded recursion in jv_contains
Same weakness: CWE-674
- CVE-2026-6811
PHP Stack Exhaustion - CVE-2026-41935
Vvveb < 1.0.8.3 Uncontrolled Recursion Denial of Service - CVE-2026-6479
PostgreSQL SSL/GSS init causes denial of service, via uncont - CVE-2026-45205
Apache Commons Configuration: StackOverflowError for YAML in - CVE-2026-45740
protobufjs: Denial of Service via unbounded recursive JSON d
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