CVE-2026-1642

8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/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 CVSS Calculator

Summary

[none]

Details

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server. 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:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "f5:nginx_instance_manager",
            "extracted_events": [
                {
                    "introduced": "2.15.1"
                },
                {
                    "last_affected": "2.21.0"
                }
            ]
        },
        {
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "f5:nginx_plus",
            "extracted_events": [
                {
                    "introduced": "r33"
                },
                {
                    "fixed": "r35"
                }
            ]
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r35:-:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*",
                "cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*"
            ],
            "vendor_product": "f5:nginx_plus",
            "extracted_events": [
                {
                    "introduced": "r32-NA"
                },
                {
                    "last_affected": "r32-NA"
                },
                {
                    "introduced": "r32-p1"
                },
                {
                    "last_affected": "r32-p1"
                },
                {
                    "introduced": "r32-p2"
                },
                {
                    "last_affected": "r32-p2"
                },
                {
                    "introduced": "r32-p3"
                },
                {
                    "last_affected": "r32-p3"
                },
                {
                    "introduced": "r33-p1"
                },
                {
                    "last_affected": "r33-p1"
                },
                {
                    "introduced": "r33-p2"
                },
                {
                    "last_affected": "r33-p2"
                },
                {
                    "introduced": "r33-p3"
                },
                {
                    "last_affected": "r33-p3"
                },
                {
                    "introduced": "r34-p1"
                },
                {
                    "last_affected": "r34-p1"
                },
                {
                    "introduced": "r34-p2"
                },
                {
                    "last_affected": "r34-p2"
                },
                {
                    "introduced": "r35-NA"
                },
                {
                    "last_affected": "r35-NA"
                },
                {
                    "introduced": "r36-NA"
                },
                {
                    "last_affected": "r36-NA"
                },
                {
                    "introduced": "r36-p1"
                },
                {
                    "last_affected": "r36-p1"
                }
            ]
        }
    ]
}

References

Affected packages

Git

github.com/nginx/kubernetes-ingress

Affected ranges

Type

GIT

Repo

https://github.com/nginx/kubernetes-ingress

Events

Introduced

0811b5c898f25d578f72a629fedef506a6511730

Last affected

561824f3077b7615c2fa764bd6d8e7a47e184857

Introduced

81bae7d0360fdf277b2d3e355d02e410ee211ef8

Last affected

43349033e28d0b6aa38773ff840deba079654a4f

Introduced

8dfabca757830d0821e86206c2db83044e6696f0

Fixed

a93bb1d70431faf564819218fe65b2d79962eb6c

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.4.0"
        },
        {
            "last_affected": "3.7.2"
        },
        {
            "introduced": "4.0.0"
        },
        {
            "last_affected": "4.0.1"
        },
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "5.3.3"
        }
    ]
}

Affected versions

v4.*

v4.0.0

v4.0.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1642.json"

github.com/nginx/nginx

Affected ranges

Type

GIT

Repo

https://github.com/nginx/nginx

Events

Introduced

479e06d88b14ea2b4512545825ccce48ca7ec028

Fixed

073ed33202286a975964c3a08f522bf01dc6fecf

Introduced

235f409907fd60eb2d8f6ecdc0e5cb163dd6d45f

Fixed

1f57d8dc9d386b46ba7e156e25345b70843e7f55

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.3.0"
        },
        {
            "fixed": "1.28.2"
        },
        {
            "introduced": "1.29.0"
        },
        {
            "fixed": "1.29.5"
        }
    ]
}

Affected versions

release-1.*

release-1.11.0

release-1.11.1

release-1.11.10

release-1.11.11

release-1.11.12

release-1.11.13

release-1.11.2

release-1.11.3

release-1.11.4

release-1.11.5

release-1.11.6

release-1.11.7

release-1.11.8

release-1.11.9

release-1.13.0

release-1.13.1

release-1.13.10

release-1.13.11

release-1.13.12

release-1.13.2

release-1.13.3

release-1.13.4

release-1.13.5

release-1.13.6

release-1.13.7

release-1.13.8

release-1.13.9

release-1.15.0

release-1.15.1

release-1.15.10

release-1.15.11

release-1.15.12

release-1.15.2

release-1.15.3

release-1.15.4

release-1.15.5

release-1.15.6

release-1.15.7

release-1.15.8

release-1.15.9

release-1.17.0

release-1.17.1

release-1.17.10

release-1.17.2

release-1.17.3

release-1.17.4

release-1.17.5

release-1.17.6

release-1.17.7

release-1.17.8

release-1.17.9

release-1.19.0

release-1.19.1

release-1.19.10

release-1.19.2

release-1.19.3

release-1.19.4

release-1.19.5

release-1.19.6

release-1.19.7

release-1.19.8

release-1.19.9

release-1.21.0

release-1.21.1

release-1.21.2

release-1.21.3

release-1.21.4

release-1.21.5

release-1.21.6

release-1.23.0

release-1.23.1

release-1.23.2

release-1.23.3

release-1.23.4

release-1.25.0

release-1.25.1

release-1.25.2

release-1.25.3

release-1.25.4

release-1.25.5

release-1.27.0

release-1.27.1

release-1.27.2

release-1.27.3

release-1.27.4

release-1.27.5

release-1.28.0

release-1.28.1

release-1.29.0

release-1.29.1

release-1.29.2

release-1.29.3

release-1.29.4

release-1.3.0

release-1.3.1

release-1.3.10

release-1.3.11

release-1.3.12

release-1.3.13

release-1.3.14

release-1.3.15

release-1.3.16

release-1.3.2

release-1.3.3

release-1.3.4

release-1.3.5

release-1.3.6

release-1.3.7

release-1.3.8

release-1.3.9

release-1.4.0

release-1.5.0

release-1.5.1

release-1.5.10

release-1.5.11

release-1.5.12

release-1.5.13

release-1.5.2

release-1.5.3

release-1.5.4

release-1.5.5

release-1.5.6

release-1.5.7

release-1.5.8

release-1.5.9

release-1.7.0

release-1.7.1

release-1.7.10

release-1.7.11

release-1.7.12

release-1.7.2

release-1.7.3

release-1.7.4

release-1.7.5

release-1.7.6

release-1.7.7

release-1.7.8

release-1.7.9

release-1.9.0

release-1.9.1

release-1.9.10

release-1.9.11

release-1.9.12

release-1.9.13

release-1.9.14

release-1.9.15

release-1.9.2

release-1.9.3

release-1.9.4

release-1.9.5

release-1.9.6

release-1.9.7

release-1.9.8

release-1.9.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1642.json"

github.com/nginx/nginx-gateway-fabric

Affected ranges

Type

GIT

Repo

https://github.com/nginx/nginx-gateway-fabric

Events

Introduced

d8c67792561eb2a0c94b17e4d2674295277005c6

Last affected

532db6a20b2912fe397211eef9f8d564d46a4bdd

Introduced

7dad8b31e3f0c3eadce36fed8c276e83e6583d24

Fixed

da2fab61996fae45397afad7897e2467953b258d

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.2.0"
        },
        {
            "last_affected": "1.6.2"
        },
        {
            "introduced": "2.0.0"
        },
        {
            "fixed": "2.4.1"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1642.json"