{"id":"BIT-nginx-2026-42530","summary":"NGINX Open-Source ngx_http_v3_module vulnerability","details":"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.  \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","aliases":["BIT-nginx-gateway-2026-42530","CVE-2026-42530"],"modified":"2026-09-08T08:48:16.829444531Z","published":"2026-06-22T05:47:01.707Z","database_specific":{"severity":"Critical","cpes":["cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"https://my.f5.com/manage/s/article/K000161616"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42530"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42530"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2489872"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42530.json"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:20351"}],"affected":[{"package":{"name":"nginx","ecosystem":"Bitnami","purl":"pkg:bitnami/nginx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.31.0"},{"fixed":"1.31.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/nginx/BIT-nginx-2026-42530.json"},"severity":[{"type":"CVSS_V4","score":"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"}]}],"schema_version":"1.9.0"}