CVE-2026-42945

9.2 (Critical) CVSS_V4 - 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 CVSS Calculator

Summary

[none]

Details

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewrite_module module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow 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.

Database specific

{
    "unresolved_ranges": [
        {
            "vendor_product": "f5:dos",
            "extracted_events": [
                {
                    "introduced": "4.3.0"
                },
                {
                    "last_affected": "4.7.0"
                }
            ],
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*"
            ]
        },
        {
            "vendor_product": "f5:nginx_instance_manager",
            "cpes": [
                "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*"
            ],
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "2.16.0"
                },
                {
                    "last_affected": "2.21.1"
                }
            ]
        },
        {
            "vendor_product": "f5:nginx_plus",
            "extracted_events": [
                {
                    "introduced": "r32"
                },
                {
                    "last_affected": "r36"
                }
            ],
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*"
            ]
        },
        {
            "vendor_product": "f5:waf",
            "extracted_events": [
                {
                    "introduced": "4.9.0"
                },
                {
                    "last_affected": "4.16.0"
                },
                {
                    "introduced": "5.1.0"
                },
                {
                    "last_affected": "5.8.0"
                },
                {
                    "introduced": "5.9.0"
                },
                {
                    "last_affected": "5.12.1"
                }
            ],
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*"
            ]
        },
        {
            "vendor_product": "f5:dos",
            "extracted_events": [
                {
                    "last_affected": "4.8.0"
                }
            ],
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:*"
            ]
        }
    ]
}

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

10b86a55601fda37765e2164d3af35df4ed453bd

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": "5.4.1"
        }
    ]
}

Affected versions

v4.*

v4.0.0

v4.0.1

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42945.json"

github.com/nginx/nginx

Affected ranges

Type

GIT

Repo

https://github.com/nginx/nginx

Events

Introduced

44186f69a3c7792cd9f62018f4e1429614a121ef

Last affected

6e14e954aaacce9a433d9b07b4653809c7594ab8

Database specific

{
    "cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "0.6.27"
        },
        {
            "last_affected": "1.30.0"
        }
    ]
}

Affected versions

release-0.*

release-0.6.27

release-0.6.28

release-0.6.29

release-0.6.30

release-0.6.31

release-0.7.0

release-0.7.1

release-0.7.10

release-0.7.11

release-0.7.12

release-0.7.13

release-0.7.14

release-0.7.15

release-0.7.16

release-0.7.17

release-0.7.18

release-0.7.19

release-0.7.2

release-0.7.20

release-0.7.21

release-0.7.22

release-0.7.23

release-0.7.24

release-0.7.25

release-0.7.26

release-0.7.27

release-0.7.28

release-0.7.29

release-0.7.3

release-0.7.30

release-0.7.31

release-0.7.32

release-0.7.33

release-0.7.34

release-0.7.35

release-0.7.36

release-0.7.37

release-0.7.38

release-0.7.39

release-0.7.4

release-0.7.40

release-0.7.41

release-0.7.42

release-0.7.43

release-0.7.44

release-0.7.45

release-0.7.46

release-0.7.47

release-0.7.48

release-0.7.49

release-0.7.5

release-0.7.50

release-0.7.51

release-0.7.52

release-0.7.53

release-0.7.54

release-0.7.55

release-0.7.56

release-0.7.57

release-0.7.58

release-0.7.59

release-0.7.6

release-0.7.7

release-0.7.8

release-0.7.9

release-0.8.0

release-0.8.1

release-0.8.10

release-0.8.11

release-0.8.12

release-0.8.13

release-0.8.14

release-0.8.15

release-0.8.16

release-0.8.17

release-0.8.18

release-0.8.19

release-0.8.2

release-0.8.20

release-0.8.21

release-0.8.22

release-0.8.23

release-0.8.24

release-0.8.25

release-0.8.26

release-0.8.27

release-0.8.28

release-0.8.29

release-0.8.3

release-0.8.30

release-0.8.31

release-0.8.32

release-0.8.33

release-0.8.34

release-0.8.35

release-0.8.36

release-0.8.37

release-0.8.38

release-0.8.39

release-0.8.4

release-0.8.40

release-0.8.41

release-0.8.42

release-0.8.43

release-0.8.44

release-0.8.45

release-0.8.46

release-0.8.47

release-0.8.48

release-0.8.49

release-0.8.5

release-0.8.50

release-0.8.51

release-0.8.52

release-0.8.53

release-0.8.6

release-0.8.7

release-0.8.8

release-0.8.9

release-0.9.0

release-0.9.1

release-0.9.2

release-0.9.3

release-0.9.4

release-0.9.5

release-0.9.6

release-0.9.7

release-1.*

release-1.0.0

release-1.0.1

release-1.0.2

release-1.0.3

release-1.0.4

release-1.0.5

release-1.1.0

release-1.1.1

release-1.1.10

release-1.1.11

release-1.1.12

release-1.1.13

release-1.1.14

release-1.1.15

release-1.1.16

release-1.1.17

release-1.1.18

release-1.1.19

release-1.1.2

release-1.1.3

release-1.1.4

release-1.1.5

release-1.1.6

release-1.1.7

release-1.1.8

release-1.1.9

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-1.2.0

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-1.29.0

release-1.29.1

release-1.29.2

release-1.29.3

release-1.29.4

release-1.29.5

release-1.29.6

release-1.29.7

release-1.29.8

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-1.30.0

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/osv-test-cve-osv-conversion/osv-output/CVE-2026-42945.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

2dacf30b4b9c29f855a9b81ff7079c472ea83661

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": "2.5.1"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42945.json"