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CVE-2026-67550
Published:July 30, 2026
Updated:August 05, 2026
re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII subject to trigger an out-of-bounds heap read and an uncatchable process crash, with limited heap information disclosure in some cases. This issue is fixed in 1.25.2.
Affected Packages
https://github.com/uhop/node-re2.git (GITHUB):
Affected version(s) >=0.9.0 <1.25.2
Fix Suggestion:
Update to version 1.25.2
re2 (NPM):
Affected version(s) >=0.9.0 <1.25.2
Fix Suggestion:
Update to version 1.25.2
re2 (NPM):
Affected version(s) >=0.9.0 <1.25.2
Fix Suggestion:
Update to version 1.25.2
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CVSS v4
Base Score:
5.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.7
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Read
EPSS
Base Score:
0.12