CVE-2026-71430Public exploit

Process abort via unchecked empty MaybeLocal

Published Aug 6, 2026 · Updated Aug 6, 2026

Denial of service in node-re2 1.25.0 and earlier allows attackers to crash a Node.js process via an amplifying global replacement. WrappedRE2::Replace passes an oversized result to V8 with ToLocalChecked without testing the returned empty MaybeLocal, causing an uncatchable abort. Reachability requires attacker influence over the input size or an output-amplifying replacement template, and the entire process or worker terminates.

CVSS severity6.2
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in node-re2 1.25.0 and earlier allows attackers to crash a Node.js process via an amplifying global replacement. WrappedRE2::Replace passes an oversized result to V8 with ToLocalChecked without testing the returned empty MaybeLocal, causing an uncatchable abort. Reachability requires attacker influence over the input size or an output-amplifying replacement template, and the entire process or worker terminates.

The record

CVE
CVE-2026-71430
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Eugene Lazutkin
Product
node-re2
Classifications
CWE-617, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.25.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Eugene Lazutkin · node-re2version=< 1.25.1

Published CVSS scores

6.2GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo