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CVE-2026-71430— node-re2: String.prototype.replace(re2, template) aborts the Node process (uncatchable ToLocalChecked on empty MaybeLocal) when the result exceeds V8's max string length

Quick assessment

Affected
uhop node-re2
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.

WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 Eugene Lazutkin node-re2 1.25.1之前版本存在异常处理不当漏洞，该漏洞源于WrappedRE2::Replace函数未检查V8返回的MaybeLocal，当替换结果超过V8最大字符串长度时可能导致进程崩溃。

CVSS 6.2 · Medium EPSS 0.16% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
uhop node-re2 < 1.25.1 affected
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I. Basic Information for CVE-2026-71430

Vulnerability Information
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Vulnerability Title
node-re2: String.prototype.replace(re2, template) aborts the Node process (uncatchable ToLocalChecked on empty MaybeLocal) when the result exceeds V8's max string length
Source: CVE Program / CVE List V5
Vulnerability Description
node-re2 provides RE2 regular expression bindings for Node.js. Prior to version 1.25.1, the WrappedRE2::Replace function built its replacement result and passed it to V8 using ToLocalChecked without checking for the empty MaybeLocal that V8 returns when the resulting string or buffer exceeds V8's maximum string length. When a global replace uses an output amplifying replacement template, the result can grow quadratically with the input size, and once the result exceeds V8's maximum string length, the unchecked ToLocalChecked call causes a fatal, uncatchable process abort instead of a catchable exception. This issue is fixed in version 1.25.1.
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
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
Eugene Lazutkin node-re2 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 Eugene Lazutkin node-re2 1.25.1之前版本存在异常处理不当漏洞，该漏洞源于WrappedRE2::Replace函数未检查V8返回的MaybeLocal，当替换结果超过V8最大字符串长度时可能导致进程崩溃。
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
uhop node-re2 < 1.25.1 -

II. Public POCs for CVE-2026-71430

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III. Intelligence Information for CVE-2026-71430

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Vendor Advisories for CVE-2026-71430 (1)

IV. Related Vulnerabilities

Same product: node-re2
Same vendor: uhop
Same weakness: CWE-617

V. Comments for CVE-2026-71430

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