CVE-2026-42268

medium Red Hat
CVSS v3 Base Score
4.9
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.1%
Exploitation probability in 30 days
Top 83% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 12, 2026 (58 days ago)
Last Modified: May 12, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in ModSecurity, an open-source web application firewall (WAF). This vulnerability occurs when an administrator configures a rule that uses `@verifySSN`, `@verifyCPF`, or `@verifySVNR` functions. An unhandled exception, specifically an unsigned integer underflow, can lead to a denial of service (DoS) condition, making the WAF unavailable.

CWE

CWE-191

Affected Products

Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com