CVE-2026-15176: Three critical NGINX web server flaws could allow code execution

Not listed so far in CISA’s catalog of actively exploited vulnerabilities.

Our analyses

Three critical NGINX web server flaws could allow code execution

F5 patched eleven web server vulnerabilities on October 14, with no known exploitation so far. Here are the exposed configurations, the versions to install and the workarounds if you can't update right away.

Oct 20, 20262 min read

What to do

Check whether your estate includes the affected product, including internet-facing devices.
Apply the vendor’s patch or mitigations (references below).
Watch for exploitation: this entry is updated if the vulnerability enters the exploited catalog or is the subject of a CERT-FR alert.

References

NVD entry (NIST)