CVE record · CVE-2026-40460

NGINX ngx_quic_module vulnerability

CVSS 6.9 MediumEPSS 0.0037 · 31st percentile

Published by the CVE Program (CNA: f5) at 13 May 2026, 14:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
F5	NGINX Plus	unaffected R37 to before * custom affected R36 to before R36 P4 custom affected R32 to before R32 P6 custom Other versions: unknown
F5	NGINX Open Source	unaffected 1.31.0 to before * semver affected 1.26.0 to before 1.30.1 semver Other versions: unaffected

Identifiers: CVE-2026-40460
CNA: f5
Weakness (CWE): CWE-290
Tags: F5 NGINX Plus
F5 NGINX Open Source
Authentication bypass
Published: 13 May 2026
Updated: 13 May 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L	CNA (f5)
6.9	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N	CNA (f5)Used for this record

CISA KEV Not listed.
EPSS 0.0037, the 31st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

my.f5.com/manage/s/article/K000161068 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.