high8.1
CVE-2026-42530
NGINX Open Source has a vulnerability in the ngx_http_v3_module module.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| F5 | Nginx Gateway Fabric | from 1.3.0 through 1.6.2 from 2.0.0 before 2.6.4 |
| F5 | Nginx Ingress Controller | from 3.5.0 through 3.7.2 from 5.0.0 before 5.5.1 Versions 4.0.0, 4.0.1 |
| F5 | Nginx Instance Manager | from 2.17.0 through 2.22.0 |
| F5 | Nginx Open Source | from 1.31.0 before 1.31.2 |