CVE-2026-42530
CRITICAL
INFO
Priority: 0.59
BB Relevance:
80/100
Published: 2026-06-17
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
None
UI:
None
S:
X
AT:
None
VC:
High
VI:
High
VA:
High
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.
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| f5 | nginx_gateway_fabric | 1.3.0 – 1.6.2 |
| f5 | nginx_gateway_fabric | 2.0.0 – 2.6.4 |
| f5 | nginx_ingress_controller | 3.5.0 – 3.7.2 |
| f5 | nginx_ingress_controller | 5.0.0 – 5.5.1 |
| f5 | nginx_ingress_controller | 4.0.0 |
| f5 | nginx_ingress_controller | 4.0.1 |
| f5 | nginx_instance_manager | 2.17.0 – 2.22.0 |
| f5 | nginx_open_source | 1.31.0 – 1.31.2 |
References & Advisories (5)
Vendor Advisory
Third Party Advisory
Third Party Advisory
Third Party Advisory