UpHeron
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Servers and applications

CVE-2026-42530

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,…

Severity
Critical 9.2
Published
17 Jun 2026
Last changed
16 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.31.2
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx_open_source
  • From 1.31.0 before 1.31.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-42530
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42530