CVE-2021-41819

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Source
https://cve.org/CVERecord?id=CVE-2021-41819
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41819.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-41819
Aliases
Downstream
Related
Published
2022-01-01T06:15:07.293Z
Modified
2026-07-09T01:25:29.088490Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                },
                {
                    "introduced": "10.0"
                },
                {
                    "last_affected": "10.0"
                },
                {
                    "introduced": "11.0"
                },
                {
                    "last_affected": "11.0"
                }
            ],
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "debian:debian_linux"
        },
        {
            "extracted_events": [
                {
                    "introduced": "34"
                },
                {
                    "last_affected": "34"
                },
                {
                    "introduced": "35"
                },
                {
                    "last_affected": "35"
                }
            ],
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "fedoraproject:fedora"
        },
        {
            "extracted_events": [
                {
                    "introduced": "15.2"
                },
                {
                    "last_affected": "15.2"
                }
            ],
            "cpes": [
                "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "opensuse:leap"
        },
        {
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                }
            ],
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux"
        },
        {
            "extracted_events": [
                {
                    "introduced": "11.0-sp1"
                },
                {
                    "last_affected": "11.0-sp1"
                },
                {
                    "introduced": "12.0"
                },
                {
                    "last_affected": "12.0"
                },
                {
                    "introduced": "15.0"
                },
                {
                    "last_affected": "15.0"
                }
            ],
            "cpes": [
                "cpe:2.3:o:suse:linux_enterprise:11.0:sp1:*:*:*:*:*:*",
                "cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:suse:linux_enterprise:15.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "suse:linux_enterprise"
        }
    ]
}
References

Affected packages

Git / github.com/ruby/cgi

Affected ranges

Type
GIT
Repo
https://github.com/ruby/cgi
Events
Introduced
cf0564fe0e01f816c0602456333c82cc8bde8cf7
Last affected
95324433b41daf7f292ba84f15b355abb7105c40
Database specific 
{
    "cpe": [
        "cpe:2.3:a:ruby-lang:cgi:0.1.0:*:*:*:*:ruby:*:*",
        "cpe:2.3:a:ruby-lang:cgi:0.2.0:*:*:*:*:ruby:*:*",
        "cpe:2.3:a:ruby-lang:cgi:0.3.0:*:*:*:*:ruby:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0.1.0"
        },
        {
            "last_affected": "0.1.0"
        },
        {
            "introduced": "0.2.0"
        },
        {
            "last_affected": "0.2.0"
        },
        {
            "introduced": "0.3.0"
        },
        {
            "last_affected": "0.3.0"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

0.*
0.1.0
0.2.0
0.3.0
v0.*
v0.1.0
v0.2.0
v0.3.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41819.json"

Git / github.com/ruby/ruby

Affected ranges

Type
GIT
Repo
https://github.com/ruby/ruby
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
768423edc2634574d66f14f3c2d3602326bfb464
Introduced
647ee6f091eafcce70ffb75ddf7e121e192ab217
Fixed
f69aeb83146be640995753667fdd6c6f157527f5
Introduced
95aff214687a5e12c3eb57d056665741e734c188
Fixed
3fb7d2cadc18472ec107b14234933b017a33c14d
Database specific 
{
    "cpe": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.6.8"
        },
        {
            "introduced": "2.7.0"
        },
        {
            "fixed": "2.7.5"
        },
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.0.3"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

Other
v1_0_r2
v2_6_8
v2_7_0
v2_7_1
v2_7_2
v2_7_3
v2_7_4
v3_0_0
v3_0_1
v3_0_2

Database specific

vanir_signatures_modified 
"2026-07-09T01:25:29Z"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "221608888545214764521643589590002473795",
                "62837079863855754692353823286478885059",
                "151633818343694841750591657495653307518",
                "112628295566100827065348454738811594068"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/ruby/ruby/commit/3fb7d2cadc18472ec107b14234933b017a33c14d",
        "id": "CVE-2021-41819-11445fd0",
        "target": {
            "file": "ext/cgi/escape/escape.c"
        }
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 658.0,
            "function_hash": "185553476159107413192269642060714357735"
        },
        "signature_version": "v1",
        "source": "https://github.com/ruby/ruby/commit/f69aeb83146be640995753667fdd6c6f157527f5",
        "id": "CVE-2021-41819-2f76299c",
        "target": {
            "function": "optimized_escape_html",
            "file": "ext/cgi/escape/escape.c"
        }
    },
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "221608888545214764521643589590002473795",
                "62837079863855754692353823286478885059",
                "151633818343694841750591657495653307518",
                "112628295566100827065348454738811594068"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/ruby/ruby/commit/f69aeb83146be640995753667fdd6c6f157527f5",
        "id": "CVE-2021-41819-799f160e",
        "target": {
            "file": "ext/cgi/escape/escape.c"
        }
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 658.0,
            "function_hash": "185553476159107413192269642060714357735"
        },
        "signature_version": "v1",
        "source": "https://github.com/ruby/ruby/commit/3fb7d2cadc18472ec107b14234933b017a33c14d",
        "id": "CVE-2021-41819-dfee3243",
        "target": {
            "function": "optimized_escape_html",
            "file": "ext/cgi/escape/escape.c"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41819.json"