CVE-2026-42530
Fixed in a distro release EPSS 6%CVSS 8.1
NGINX Open Source has a vulnerability in the ngx_http_v3_module module. When NGINX Open Source is configured to use the HTTP/3 QUIC module, a remote unauthenticated attacker along with conditions beyond their control can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Products: F5 NGINX Open Source, Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Lightspeed proxy 1
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | nginx-mainline | 1.31.2-r0 |
| Debian 14 | nginx | no fix |
| Red Hat hummingbird 1 | nginx | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-all-modules | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-core | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-filesystem | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-devel | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-geoip | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-image-filter | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-perl | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-xslt-filter | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-mail | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-stream | 0:1.30.2-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-stream-geoip | 0:1.30.2-1.hum1 |
| Ubuntu 22.04 LTS | nginx | no fix |
| Ubuntu 24.04 LTS | nginx | no fix |
| Ubuntu 25.10 | nginx | no fix |
| Ubuntu 26.04 LTS | nginx | no fix |
| Ubuntu Pro 14.04 LTS | nginx | no fix |
| Ubuntu Pro 16.04 LTS | nginx | no fix |
| Ubuntu Pro 18.04 LTS | nginx | no fix |
| Ubuntu Pro 20.04 LTS | nginx | no fix |
| Wolfi | nginx-mainline | 1.31.2-r0 |
| openSUSE Tumbleweed | nginx | 1.31.2-1.1 |