# CVE-2026-40460: NGINX ngx_quic_module vulnerability

CVE-2026-40460 is fixed in 29 products on 1 platform, first by libnginx-mod-http-geoip 1.28.0-6ubuntu1.4, released May 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-40460
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 13, 2026
- Weakness: Authentication Bypass by Spoofing
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40460

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnginx-mod-http-geoip Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-http-geoip 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-geoip-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-http-geoip Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-http-geoip 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-http-geoip-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-http-image-filter Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-http-image-filter 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-image-filter-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-http-image-filter Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-http-image-filter 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-http-image-filter-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-http-perl Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-http-perl 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-perl-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-http-perl Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-http-perl 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-http-perl-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-http-xslt-filter Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-http-xslt-filter 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-xslt-filter-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-http-xslt-filter Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-http-xslt-filter 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-http-xslt-filter-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-mail Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-mail 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-mail-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-mail Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-mail 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-mail-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-stream Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-stream 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-stream-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-stream Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-stream 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-stream-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | libnginx-mod-stream-geoip Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [libnginx-mod-stream-geoip 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-stream-geoip-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | libnginx-mod-stream-geoip Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [libnginx-mod-stream-geoip 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnginx-mod-stream-geoip-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx Debian 13.5 (trixie) | 1.26.3-3+deb13u5 | [DEBIAN-CVE-2026-40460](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40460.md) | May 27, 2026 |
| Linux | nginx Debian 14 | 1.30.0-4 | [DEBIAN-CVE-2026-40460](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40460.md) | May 27, 2026 |
| Linux | nginx Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx opensuse-leap 16.0 | 1.27.2-160000.6.1 | [OPENSUSE-SU-2026:21439-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21439-1.md) | Jul 24, 2026 |
| Linux | nginx sles 16.0 | 1.27.2-160000.6.1 | [SUSE-SU-2026:22951-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22951-1.md) | Jul 24, 2026 |
| Linux | nginx-all-modules amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-common Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx-common 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-common-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx-common Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx-common 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-common-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx-core Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx-core 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-core-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx-core Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx-core 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-core-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx-core amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-core-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-debugsource amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-extras Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx-extras 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-extras-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx-extras Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx-extras 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-extras-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx-filesystem amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-full Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx-full 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-full-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx-full Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx-full 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-full-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx-light Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.4 | [nginx-light 1.28.0-6ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-light-1.28.0-6ubuntu1.4.md) | May 22, 2026 |
| Linux | nginx-light Ubuntu 26.04.1 LTS (resolute) | 1.28.3-2ubuntu1.2 | [nginx-light 1.28.3-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nginx-light-1.28.3-2ubuntu1.2.md) | May 22, 2026 |
| Linux | nginx-mod-devel amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-image-filter amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-image-filter-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-perl amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-perl-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-xslt-filter amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-http-xslt-filter-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-mail amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-mail-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-stream amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |
| Linux | nginx-mod-stream-debuginfo amzn 2023 | 1:1.30.1-1.amzn2023.0.1 | [ALAS2023-2026-1714](https://patchblox.com/security/data/fix/linux/alas2023-2026-1714.md) | May 25, 2026 |

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