CVE-2026-67550: CWE-125: Out-of-bounds Read in uhop node-re2
CVE-2026-67550 is an out-of-bounds read vulnerability in the node-re2 package, which provides Node.js bindings for Google's RE2 regular expression engine. Versions prior to 1.25.2 improperly validate and use the lastIndex parameter, leading to a heap read beyond allocated memory when processing non-ASCII subjects. This can cause an uncatchable process crash and limited heap information disclosure. The issue is fixed in version 1.25.2.
AI Analysis
Technical Summary
The node-re2 package prior to version 1.25.2 validates the lastIndex parameter against the UTF-8 byte length of the input string but uses it as a UTF-16 code-unit offset in functions like exec, test, match, replace, and split. This mismatch allows an attacker-controlled lastIndex on non-ASCII input to trigger an out-of-bounds heap read, resulting in a process crash that cannot be caught and potential limited disclosure of heap memory contents. The vulnerability is identified as CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 base score of 5.7, indicating medium severity. The issue is resolved in node-re2 version 1.25.2.
Potential Impact
An attacker able to influence the lastIndex parameter on non-ASCII input can cause the Node.js process using node-re2 to crash in an uncatchable manner, resulting in denial of service. Additionally, limited heap memory information may be disclosed during the out-of-bounds read. There is no indication of code execution or integrity impact.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.2 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated. Patch status is confirmed fixed in 1.25.2.
CVE-2026-67550: CWE-125: Out-of-bounds Read in uhop node-re2
Description
CVE-2026-67550 is an out-of-bounds read vulnerability in the node-re2 package, which provides Node.js bindings for Google's RE2 regular expression engine. Versions prior to 1.25.2 improperly validate and use the lastIndex parameter, leading to a heap read beyond allocated memory when processing non-ASCII subjects. This can cause an uncatchable process crash and limited heap information disclosure. The issue is fixed in version 1.25.2.
CVSS v3.1
Score 5.7medium
Affected software
uhop
node-re2
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The node-re2 package prior to version 1.25.2 validates the lastIndex parameter against the UTF-8 byte length of the input string but uses it as a UTF-16 code-unit offset in functions like exec, test, match, replace, and split. This mismatch allows an attacker-controlled lastIndex on non-ASCII input to trigger an out-of-bounds heap read, resulting in a process crash that cannot be caught and potential limited disclosure of heap memory contents. The vulnerability is identified as CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 base score of 5.7, indicating medium severity. The issue is resolved in node-re2 version 1.25.2.
Potential Impact
An attacker able to influence the lastIndex parameter on non-ASCII input can cause the Node.js process using node-re2 to crash in an uncatchable manner, resulting in denial of service. Additionally, limited heap memory information may be disclosed during the out-of-bounds read. There is no indication of code execution or integrity impact.
Mitigation Recommendations
Upgrade node-re2 to version 1.25.2 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated. Patch status is confirmed fixed in 1.25.2.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-29T18:47:17.075Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6baf0d9c2644c7f89b9bc5
Added to database: 07/30/2026, 20:07:41 UTC
Last enriched: 08/07/2026, 14:32:34 UTC
Last updated: 09/13/2026, 22:01:36 UTC
Views: 61
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