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Fencer Intel
medium 6.5

CVE-2026-40460 json

NGINX ngx_quic_module vulnerability

published 5mo ago modified 14d ago also BIT-nginx-2026-40460 , BIT-nginx-gateway-2026-40460 , EUVD-2026-29974

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Patch / fix

  • bitnami nginx 1.30.1
  • bitnami nginx-gateway 1.30.1
  • F5 NGINX Plus R32 P6, R36 P4, R37
  • F5 NGINX Open Source 1.30.1, 1.31.0
  • nginx Debian 13 1.26.3-3+deb13u5
  • nginx Debian 14 1.30.0-4

debian advisories DEBIAN-CVE-2026-40460

  • nginx Ubuntu 25.10 1.28.0-6ubuntu1.4
  • nginx Ubuntu 26.04 LTS 1.28.3-2ubuntu1.2

ubuntu advisories UBUNTU-CVE-2026-40460

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx hummingbird 1 1.30.2-1.hum1
  • nginx-core hummingbird 1 1.30.2-1.hum1
  • nginx-mod-mail hummingbird 1 1.30.2-1.hum1
  • nginx-filesystem hummingbird 1 1.30.2-1.hum1
  • nginx-mod-stream hummingbird 1 1.30.2-1.hum1
  • nginx-all-modules hummingbird 1 1.30.2-1.hum1
  • nginx-mod-http-perl hummingbird 1 1.30.2-1.hum1
  • nginx-mod-http-geoip hummingbird 1 1.30.2-1.hum1

red hat advisories RHSA-2026:20351

  • nginx SLES 16.0, SLES for SAP applications 16.0 1.27.2-160000.6.1

suse advisories SUSE-SU-2026:22943-1SUSE-SU-2026:22951-1

  • nginx openSUSE Leap 16.0 1.27.2-160000.6.1
  • nginx openSUSE Tumbleweed 1.31.0-1.1

opensuse advisories openSUSE-SU-2026:21439-1openSUSE-SU-2026:10796-1

  • nginx Alpine 3.21 1.26.3-r1
  • nginx Alpine 3.23, Alpine 3.22 1.28.3-r1
  • nginx Alpine 3.24 1.30.1-r0

alpine advisories ALPINE-CVE-2026-40460

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx Azure Linux 3.0 1.28.3-4

azure linux advisories AZL-86847

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-40460 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-40460 updated cvss 6.5

nginx: NGINX: Authorization bypass via IP spoofing in HTTP/3 QUIC module

  • Red Hat Enterprise Linux 8 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +2 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 nginx, nginx-core, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, +3 more
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 10 nginx
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images nginx 1.30.2-1.hum1, nginx-core 1.30.2-1.hum1, nginx-mod-mail 1.30.2-1.hum1, nginx-filesystem 1.30.2-1.hum1, nginx-mod-stream 1.30.2-1.hum1, nginx-all-modules 1.30.2-1.hum1, +5 more
    fixed: vendor fix RHSA-2026:20351

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CNA 4.0 6.9 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 4.0 6.9 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
bitnami nginx
>=1.26.0, <1.30.1
1.30.1
bitnami nginx-gateway
>=1.26.0, <1.30.1
1.30.1

Affected products

  • F5 NGINX Plus
  • F5 NGINX Open Source

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.