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CVE-2026-33947— jq: Unbounded Recursion in jv_setpath(), jv_getpath() and delpaths_sorted()

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_setpath、jv_getpath和delpaths_sorted函数使用无限制递归，可能导致拒绝服务攻击。

CVSS 6.2 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-33947

Vulnerability Information
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Vulnerability Title
jq: Unbounded Recursion in jv_setpath(), jv_getpath() and delpaths_sorted()
Source: CVE Program / CVE List V5
Vulnerability Description
jq is a command-line JSON processor. In versions 1.8.1 and below, functions jv_setpath(), jv_getpath(), and delpaths_sorted() in jq's src/jv_aux.c use unbounded recursion whose depth is controlled by the length of a caller-supplied path array, with no depth limit enforced. An attacker can supply a JSON document containing a flat array of ~65,000 integers (~200 KB) that, when used as a path argument by a trusted jq filter, exhausts the C call stack and crashes the process with a segmentation fault (SIGSEGV). This bypass works because the existing MAX_PARSING_DEPTH (10,000) limit only protects the JSON parser, not runtime path operations where arrays can be programmatically constructed to arbitrary lengths. The impact is denial of service (unrecoverable crash) affecting any application or service that processes untrusted JSON input through jq's setpath, getpath, or delpaths builtins. This issue has been addressed in commit fb59f1491058d58bdc3e8dd28f1773d1ac690a1f.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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_setpath、jv_getpath和delpaths_sorted函数使用无限制递归，可能导致拒绝服务攻击。
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 < fb59f1491058d58bdc3e8dd28f1773d1ac690a1f -

II. Public POCs for CVE-2026-33947

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III. Intelligence Information for CVE-2026-33947

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Patches & Fixes for CVE-2026-33947 (1)

Vendor Advisories for CVE-2026-33947 (1)

Same Patch Batch · jqlang · 2026-04-13 · 6 CVEs total

CVE-2026-32316 8.2 HIGH jq: Integer overflow in jvp_string_append() allows Heap-based Buffer Overflow
CVE-2026-40164 7.5 HIGH jq: Algorithmic complexity DoS via hardcoded MurmurHash3 seed
CVE-2026-39956 6.1 MEDIUM jq: Missing runtime type checks for _strindices lead to crash and limited memory disclosur
CVE-2026-39979 jq: Out-of-Bounds Read in jv_parse_sized() Error Formatting for Non-NUL-Terminated Counted
CVE-2026-33948 jq: Embedded-NUL Truncation in CLI JSON Input Path Causes Prefix-Only Validation of Malfor

IV. Related Vulnerabilities

Same product: jq
Same vendor: jqlang
Same weakness: CWE-674

V. Comments for CVE-2026-33947

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