CVE-2026-67550
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-07-30
Modified: 2026-10-23
First seen: 2026-10-29
Status: active
Attack Surface
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
None
UI:
None
S:
Unchanged
C:
Low
I:
None
A:
High
Description
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.