CVE-2026-42530
Description
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.
How to fix
- f5 nginx_gateway_fabric2.6.4 or later
- f5 nginx_ingress_controller5.5.1 or later
- f5 nginx_open_source1.31.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| f5 nginx_gateway_fabric | 1.3.0 ≤ v ≤ 1.6.2, 2.0.0 ≤ v < 2.6.4 | 2.6.4 |
| f5 nginx_ingress_controller | 3.5.0 ≤ v ≤ 3.7.2, 5.0.0 ≤ v < 5.5.1, 4.0.0, 4.0.1 | 5.5.1 |
| f5 nginx_instance_manager | 2.17.0 ≤ v ≤ 2.22.0 | — |
| f5 nginx_open_source | 1.31.0 ≤ v < 1.31.2 | 1.31.2 |
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