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CVE-2026-54679— jq: potential integer overflow in jvp_string_append

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.

jqlang jq是jqlang团队开源的一个轻量级且灵活的命令行 JSON 处理器。 jqlang jq 1.8.2之前版本存在数字错误漏洞，该漏洞源于在32位系统上jvp_string_append函数存在整数溢出，可能导致缓冲区溢出。

AI Predicted 7.8 Difficulty: Easy EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
jqlang jq < 1.8.2 affected
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I. Basic Information for CVE-2026-54679

Vulnerability Information
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Vulnerability Title
jq: potential integer overflow in jvp_string_append
Source: CVE Program / CVE List V5
Vulnerability Description
jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of integer/multiple overflowing and then causing a massive buffer overrun. This vulnerability is fixed in 1.8.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
jqlang jq 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jqlang jq是jqlang团队开源的一个轻量级且灵活的命令行 JSON 处理器。 jqlang jq 1.8.2之前版本存在数字错误漏洞，该漏洞源于在32位系统上jvp_string_append函数存在整数溢出，可能导致缓冲区溢出。
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 < 1.8.2 -

II. Public POCs for CVE-2026-54679

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III. Intelligence Information for CVE-2026-54679

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Vendor Advisories for CVE-2026-54679 (1)

Same Patch Batch · jqlang · 2026-06-25 · 3 CVEs total

CVE-2026-49839 7.1 HIGH jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow
CVE-2026-47770 jq: stack overflow in deep structural equality

IV. Related Vulnerabilities

Same product: jq
Same vendor: jqlang
Same weakness: CWE-190

V. Comments for CVE-2026-54679

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