CVE catalog
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 beyo
- Severity
- Critical · CVSS 9.2
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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 6.45% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nginx | sid | 1.30.6-2 | not affected |
| Debian | nginx | forky | 1.30.6-2 | not affected |
| Debian | nginx | trixie | 1.26.3-3+deb13u7 | not affected |
| Debian | nginx | trixie-security | 1.26.3-3+deb13u10 | not affected |
| Debian | nginx | bookworm | 1.22.1-9+deb12u9 | not affected |
| Debian | nginx | bookworm-security | 1.22.1-9+deb12u10 | not affected |
| Cpe | nginx_gateway_fabric | Not reported | Not reported | unknown |
| Cpe | nginx_gateway_fabric | Not reported | 2.6.4 | fixed |
| Cpe | nginx_ingress_controller | Not reported | Not reported | unknown |
| Cpe | nginx_ingress_controller | Not reported | 5.5.1 | fixed |
| Cpe | nginx_instance_manager | Not reported | Not reported | unknown |
| Cpe | nginx_open_source | Not reported | 1.31.2 | fixed |
| Cpe | nginx | Not reported | Not reported | not affected |
| Cpe | nginx_gateway_fabric | Not reported | 2.6.4 | fixed |
| Cpe | nginx_ingress_controller | Not reported | Not reported | unknown |
| Cpe | nginx_instance_manager | Not reported | Not reported | unknown |
| Cpe | nginx_open_source | Not reported | 1.31.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nginx | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | nginx | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | nginx | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | nginx | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Cpe | nginx_gateway_fabric | cpe | Not reported | 2.6.4 | Not reported | Not reported | Not reported |
| Cpe | nginx_ingress_controller | cpe | Not reported | 5.5.1 | Not reported | Not reported | Not reported |
| Cpe | nginx_open_source | cpe | Not reported | 1.31.2 | Not reported | Not reported | Not reported |
| Cpe | nginx_gateway_fabric | cpe | Not reported | 2.6.4 | Not reported | NVD-CVE-2026-42530 | Not reported |
| Cpe | nginx_open_source | cpe | Not reported | 1.31.2 | Not reported | NVD-CVE-2026-42530 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnginx-mod-http-geoip]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-http-image-filter]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-http-perl]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-http-xslt-filter]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-mail]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-stream]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [libnginx-mod-stream-geoip]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx]Not affected
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-common]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-core]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-dev]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-doc]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-extras]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· amd64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· amd64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· arm64 · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-full]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
- [nginx-light]Not affected
Source package: [nginx]
Details (4)
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookwormNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
1.22.1-9+deb12u9· all · bookworm-securityNot affected
nvd · nginx · debian · bookworm
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:20351]
- [https://access.redhat.com/security/cve/CVE-2026-42530]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2489872]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11066-1.json]
- [https://my.f5.com/manage/s/article/K000161616]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42530]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42530]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-42530]
- [https://security-tracker.debian.org/tracker/CVE-2026-42530]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42530.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1995.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]