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CVE-2026-30873— OpenWrt Project jsonpath: Memory leak when processing strings, labels, and regexp tokens

Quick assessment

Affected
openwrt openwrt
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.

OpenWrt是OpenWrt开源的一套针对嵌入式设备的Linux操作系统。 OpenWrt 24.10.6之前版本和25.12.1之前版本存在安全漏洞，该漏洞源于jp_get_token函数存在内存泄漏，可能导致资源耗尽。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1562
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I. Basic Information for CVE-2026-30873

Vulnerability Information
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Vulnerability Title
OpenWrt Project jsonpath: Memory leak when processing strings, labels, and regexp tokens
Source: CVE Program / CVE List V5
Vulnerability Description
OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to both 24.10.6 and 25.12.1, the jp_get_token function, which performs lexical analysis by breaking input expressions into tokens, contains a memory leak vulnerability when extracting string literals, field labels, and regular expressions using dynamic memory allocation. These extracted results are stored in a jp_opcode struct, which is later copied to a newly allocated jp_opcode object via jp_alloc_op. During this transfer, if a string was previously extracted and stored in the initial jp_opcode, it is copied to the new allocation but the original memory is never freed, resulting in a memory leak. This issue has been fixed in versions 24.10.6 and 25.12.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenWrt 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenWrt是OpenWrt开源的一套针对嵌入式设备的Linux操作系统。 OpenWrt 24.10.6之前版本和25.12.1之前版本存在安全漏洞，该漏洞源于jp_get_token函数存在内存泄漏，可能导致资源耗尽。
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
openwrt openwrt >= 25.12.0-rc1, < 25.12.1 -

II. Public POCs for CVE-2026-30873

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III. Intelligence Information for CVE-2026-30873

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Vendor Advisories for CVE-2026-30873 (1)

Vendor Pages for CVE-2026-30873 (2)

Same Patch Batch · openwrt · 2026-03-19 · 5 CVEs total

CVE-2026-32721 8.6 HIGH LuCI luci-mod-network: Possible XSS attack in WiFi scan on Joining Wireless Client modal
CVE-2026-30871 OpenWrt Project has Stack-based Buffer Overflow in DNS PTR Query
CVE-2026-30872 OpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS looku
CVE-2026-30874 OpenWrt procd PATH Environment Variable Filter Bypass via Incorrect String Comparison Lead

IV. Related Vulnerabilities

Same product: openwrt
Same vendor: openwrt
Same weakness: CWE-401

V. Comments for CVE-2026-30873

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