CVE-2026-40701

medium Red Hat
CVSS v3 Base Score
4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
EPSS Score
0.0%
Exploitation probability in 30 days
Top 86% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Published: May 13, 2026 (57 days ago)
Last Modified: May 13, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the ngx_http_ssl_module module of NGINX. When the ssl_verify_client directive is set to "on" or "optional" and the ssl_ocsp directive is enabled or its leaf parameters are configured with a resolver, an unauthenticated attacker can send crafted requests to cause a use-after-free issue in the worker process, resulting in a limited modification of memory data or a denial of service by forcing the process to restart.

CWE

CWE-416

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9Red Hat Hardened ImagesRed Hat Lightspeed proxy 1

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 my.f5.com