PT-2026-60184 · F5 · Nginx Plus+1
Published
2026-07-15
·
Updated
2026-07-15
·
CVE-2026-56434
CVSS v3.1
6.5
Medium
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H |
Name of the Vulnerable Software and Affected Versions
NGINX Plus (affected versions not specified)
NGINX Open Source (affected versions not specified)
Description
A flaw exists in the
ngx http ssi module module when Server-Side Includes (SSI), proxy pass, and proxy buffering off directives are configured. An unauthenticated attacker with man-in-the-middle (MITM) capabilities to control responses from an upstream server can trigger a use-after-free or a heap buffer over-read in the NGINX worker process. This may result in limited memory modification or a restart of the worker process. This is a data plane issue with no control plane exposure.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Nginx Open Source
Nginx Plus