Out-of-bounds Read in Uhop Node-Re2
CVE-2026-67550
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Uhop Node-Re2 — versions < 1.25.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-67550?
- CVE-2026-67550 is a medium-severity vulnerability in Uhop Node-Re2, classified under Out-of-bounds Read. CVSS score: 5.7/10. Published 2026-07-30.
- How severe is CVE-2026-67550?
- Medium severity. CVSS v3 base score is 5.7 out of 10.