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 uses V8's ToLocalChecked without verifying if the resulting string exceeds V8's maximum string length, leading to a fatal process abort. The issue is fixed in version 1.25.1.
AI Analysis
Technical Summary
node-re2 is a Node.js binding for the RE2 regular expression library. In versions before 1.25.1, the WrappedRE2::Replace function constructs a replacement string and passes it to V8 using ToLocalChecked without checking for an empty MaybeLocal. When a global replace uses an output amplifying replacement template, the replacement string can grow quadratically relative to the input size. If this string exceeds V8's maximum string length, ToLocalChecked triggers a fatal, uncatchable process abort instead of throwing a catchable exception. This vulnerability is identified as CWE-617 (Reachable Assertion) and is resolved in node-re2 version 1.25.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the Node.js process running node-re2 due to an uncatchable fatal abort. There is no impact on confidentiality or integrity. The CVSS v3.1 score is 6.2 (medium severity), reflecting local attack vector, low complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.1 or later, where this issue is fixed. There is no indication of any temporary workaround or alternative mitigation. Patch status is confirmed fixed in 1.25.1.
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 uses V8's ToLocalChecked without verifying if the resulting string exceeds V8's maximum string length, leading to a fatal process abort. The issue is fixed in version 1.25.1.
CVSS v3.1
Score 6.2medium
Affected software
uhop
node-re2
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
node-re2 is a Node.js binding for the RE2 regular expression library. In versions before 1.25.1, the WrappedRE2::Replace function constructs a replacement string and passes it to V8 using ToLocalChecked without checking for an empty MaybeLocal. When a global replace uses an output amplifying replacement template, the replacement string can grow quadratically relative to the input size. If this string exceeds V8's maximum string length, ToLocalChecked triggers a fatal, uncatchable process abort instead of throwing a catchable exception. This vulnerability is identified as CWE-617 (Reachable Assertion) and is resolved in node-re2 version 1.25.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the Node.js process running node-re2 due to an uncatchable fatal abort. There is no impact on confidentiality or integrity. The CVSS v3.1 score is 6.2 (medium severity), reflecting local attack vector, low complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.1 or later, where this issue is fixed. There is no indication of any temporary workaround or alternative mitigation. Patch status is confirmed fixed in 1.25.1.
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
Threat ID: 6a75070dbf8831d5395f5c80
Added to database: 08/06/2026, 22:13:33 UTC
Last enriched: 08/14/2026, 16:08:16 UTC
Last updated: 09/21/2026, 22:01:37 UTC
Views: 33
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