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CVE-2026-90439

NGINX ngx_http_v3_module vulnerability

CVSS 3.1 6.5 MEDIUMCVSS 4.0 6.9 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-90439

Published

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90439

Published

NGINX Plus

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unknown",
                    "modules": [
                        "ngx_http_v3_module"
                    ],
                    "product": "NGINX Plus",
                    "vendor": "F5",
                    "versions": [
                        {
                            "lessThan": "37.1.1.2",
                            "status": "affected",
                            "version": "37.1.0.1",
                            "versionType": "custom"
                        },
                        {
                            "lessThan": "37.0.6.2",
                            "status": "affected",
                            "version": "37.0.0.1",
                            "versionType": "custom"
                        }
                    ]
                }

NGINX Open Source

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "modules": [
                        "ngx_http_v3_module"
                    ],
                    "product": "NGINX Open Source",
                    "vendor": "F5",
                    "versions": [
                        {
                            "lessThan": "1.31.6",
                            "status": "affected",
                            "version": "1.29.2",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "1.30.5",
                            "status": "affected",
                            "version": "1.30.4",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON