CVE-2026-71430: CWE-617: Reachable Assertion in uhop node-re2
node-re2 versions prior to 1.25.1 contain a reachable assertion vulnerability in the WrappedRE2::Replace function. This occurs because the function does not check for an empty MaybeLocal returned by V8 when the replacement string exceeds V8's maximum string length. Exploiting this can cause a fatal, uncatchable process abort. The issue is fixed in version 1.25.1.
AI Analysis
Technical Summary
The vulnerability in node-re2 affects the WrappedRE2::Replace function, which builds a replacement string and passes it to V8 using ToLocalChecked without verifying if the MaybeLocal is empty. When a global replace uses an output amplifying replacement template, the resulting string can grow quadratically and exceed V8's maximum string length. This triggers an unchecked ToLocalChecked call that causes a fatal process abort instead of a catchable exception. This defect is addressed in node-re2 version 1.25.1.
Potential Impact
A successful trigger of this vulnerability results in a fatal, uncatchable process abort, causing denial of service for applications using vulnerable node-re2 versions. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.1 or later, where this issue is fixed. No other mitigation or workaround is indicated.
CVE-2026-71430: CWE-617: Reachable Assertion in uhop node-re2
Description
node-re2 versions prior to 1.25.1 contain a reachable assertion vulnerability in the WrappedRE2::Replace function. This occurs because the function does not check for an empty MaybeLocal returned by V8 when the replacement string exceeds V8's maximum string length. Exploiting this can cause a fatal, uncatchable process abort. The issue is fixed in version 1.25.1.
CVSS v3.1
Score 6.2medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in node-re2 affects the WrappedRE2::Replace function, which builds a replacement string and passes it to V8 using ToLocalChecked without verifying if the MaybeLocal is empty. When a global replace uses an output amplifying replacement template, the resulting string can grow quadratically and exceed V8's maximum string length. This triggers an unchecked ToLocalChecked call that causes a fatal process abort instead of a catchable exception. This defect is addressed in node-re2 version 1.25.1.
Potential Impact
A successful trigger of this vulnerability results in a fatal, uncatchable process abort, causing denial of service for applications using vulnerable node-re2 versions. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.1 or later, where this issue is fixed. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-06T16:28:51.182Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a75070dbf8831d5395f5c80
Added to database: 08/06/2026, 22:13:33 UTC
Last enriched: 08/06/2026, 22:42:25 UTC
Last updated: 08/07/2026, 00:40:27 UTC
Views: 4
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