CRITICAL🇵🇱 Wersja polska

CVE-2026-42530

CVSS 9.2v4.0pub. 2026-06-17upd. 2026-07-16

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.

CVSS Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

  • F5 nginx Gateway Fabric

    APP
    F5
    1.3.0 – 1.6.22.0.0 – 2.6.4 (excl.)

  • F5 nginx Ingress Controller

    APP
    F5
    4.0.04.0.15.0.0 – 5.5.1 (excl.)3.5.0 – 3.7.2

  • F5 nginx Instance Manager

    APP
    F5
    2.17.0 – 2.22.0

  • F5 nginx Open Source

    APP
    F5
    1.31.0 – 1.31.2 (excl.)
🔵
CHECK WITH VENDOR
No clear patch data available. Check vendor references.
Tags
Auth BypassMemory
CWE
References

Related vulnerabilities

CVE-2026-42533CRITICAL9.2PL ✓same product

Heap buffer overflow w NGINX Plus i NGINX Open Source — DoS i możliwy RCE

CVE-2026-42055CRITICAL9.2PL ✓same product

NGINX Plus/Open Source: heap buffer overflow w modułach HTTP/2 i gRPC

CVE-2026-9256CRITICAL9.2PL ✓same product

Heap buffer overflow w NGINX w module ngx_http_rewrite_module (RCE)

CVE-2026-42945CRITICAL9.2PL ✓same product

NGINX heap buffer overflow w module ngx_http_rewrite_module (RCE/restart)

CVE-2026-52865HIGH7.1PL ✓same product

F5 NGINX Ingress Controller – DoS poprzez NULL pointer dereference (CWE-476)