CVE-2026-42926

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Source
https://cve.org/CVERecord?id=CVE-2026-42926
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42926.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42926
Aliases
Downstream
Related
Published
2026-05-13T16:16:49.640Z
Modified
2026-06-26T03:55:23.843185791Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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 CVSS Calculator
Summary
[none]
Details

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "2.16.0"
                },
                {
                    "last_affected": "2.22.0"
                }
            ],
            "vendor_product": "f5:nginx_instance_manager"
        }
    ]
}
References

Affected packages

Git
github.com/nginx/kubernetes-ingress

Affected ranges

Type
GIT
Repo
https://github.com/nginx/kubernetes-ingress
Events
Introduced
33971b8ff54bc55785a7b38c07a21e03bda25080
Last affected
561824f3077b7615c2fa764bd6d8e7a47e184857
Introduced
81bae7d0360fdf277b2d3e355d02e410ee211ef8
Last affected
43349033e28d0b6aa38773ff840deba079654a4f
Introduced
8dfabca757830d0821e86206c2db83044e6696f0
Last affected
cd864d71a5e3b6698b80daee02b2785c4020db10
Database specific 
{
    "cpe": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "3.5.0"
        },
        {
            "last_affected": "3.7.2"
        },
        {
            "introduced": "4.0.0"
        },
        {
            "last_affected": "4.0.1"
        },
        {
            "introduced": "5.0.0"
        },
        {
            "last_affected": "5.4.2"
        }
    ]
}

Affected versions

v4.*
v4.0.0
v4.0.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42926.json"
github.com/nginx/nginx

Affected ranges

Type
GIT
Repo
https://github.com/nginx/nginx
Events
Introduced
c70457482c4223b6fd9adc3caa6a302163e6030d
Last affected
6e14e954aaacce9a433d9b07b4653809c7594ab8
Database specific 
{
    "cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "1.29.4"
        },
        {
            "last_affected": "1.30.0"
        }
    ]
}

Affected versions

release-1.*
release-1.29.4
release-1.29.5
release-1.29.6
release-1.29.7
release-1.29.8
release-1.30.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42926.json"
github.com/nginx/nginx-gateway-fabric

Affected ranges

Type
GIT
Repo
https://github.com/nginx/nginx-gateway-fabric
Events
Introduced
3a372747333fb1db372af7cf0b18ed7eef7c91f7
Last affected
532db6a20b2912fe397211eef9f8d564d46a4bdd
Introduced
7dad8b31e3f0c3eadce36fed8c276e83e6583d24
Last affected
95a66d8cec0ce98e1985aeab728317c5ba7ec0c6
Database specific 
{
    "cpe": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "1.3.0"
        },
        {
            "last_affected": "1.6.2"
        },
        {
            "introduced": "2.0.0"
        },
        {
            "last_affected": "2.6.0"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42926.json"