CURL-CVE-2023-46218

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Source
https://curl.se/docs/CVE-2023-46218.html
Import Source
https://curl.se/docs/CURL-CVE-2023-46218.json
JSON Data
https://api.test.osv.dev/v1/vulns/CURL-CVE-2023-46218
Aliases
Published
2023-12-06T08:00:00Z
Modified
2026-05-29T05:40:24.473065Z
Summary
cookie mixed case PSL bypass
Details

This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains.

It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with domain=co.UK when the URL used a lowercase hostname curl.co.uk, even though co.uk is listed as a PSL domain.

Database specific 
{
    "severity": "Medium",
    "www": "https://curl.se/docs/CVE-2023-46218.html",
    "package": "curl",
    "URL": "https://curl.se/docs/CVE-2023-46218.json",
    "award": {
        "amount": "2540",
        "currency": "USD"
    },
    "affects": "both",
    "CWE": {
        "desc": "Information Exposure Through Sent Data",
        "id": "CWE-201"
    },
    "issue": "https://hackerone.com/reports/2212193",
    "last_affected": "8.4.0"
}
References
Credits
    • Harry Sintonen - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.46.0
Fixed
8.5.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
e77b5b7453c1e8ccd7ec0816890d98e2f392e465
Fixed
2b0994c29a721c91c572cff7808c572a24d251eb

Affected versions

7.*
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0
7.79.0
7.79.1
7.80.0
7.81.0
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.2.0
8.2.1
8.3.0
8.4.0
Other
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1
curl-7_55_0
curl-7_55_1
curl-7_56_0
curl-7_56_1
curl-7_57_0
curl-7_58_0
curl-7_59_0
curl-7_60_0
curl-7_61_0
curl-7_61_1
curl-7_62_0
curl-7_63_0
curl-7_64_0
curl-7_64_1
curl-7_65_0
curl-7_65_1
curl-7_65_2
curl-7_65_3
curl-7_66_0
curl-7_67_0
curl-7_68_0
curl-7_69_0
curl-7_69_1
curl-7_70_0
curl-7_71_0
curl-7_71_1
curl-7_72_0
curl-7_73_0
curl-7_74_0
curl-7_75_0
curl-7_76_0
curl-7_76_1
curl-7_77_0
curl-7_78_0
curl-7_79_0
curl-7_79_1
curl-7_80_0
curl-7_81_0
curl-7_82_0
curl-7_83_0
curl-7_83_1
curl-7_84_0
curl-7_85_0
curl-7_86_0
curl-7_87_0
curl-7_88_0
curl-7_88_1
curl-8_0_0
curl-8_0_1
curl-8_1_0
curl-8_1_1
curl-8_1_2
curl-8_2_0
curl-8_2_1
curl-8_3_0
curl-8_4_0
tiny-curl-7_72_0
tiny-curl-8_4_0

Database specific

vanir_signatures 
[
    {
        "id": "CURL-CVE-2023-46218-04099297",
        "deprecated": false,
        "digest": {
            "length": 10170.0,
            "function_hash": "138260655856239098081716053511788377221"
        },
        "signature_version": "v1",
        "target": {
            "file": "lib/cookie.c",
            "function": "Curl_cookie_add"
        },
        "source": "https://github.com/curl/curl.git/commit/2b0994c29a721c91c572cff7808c572a24d251eb",
        "signature_type": "Function"
    },
    {
        "id": "CURL-CVE-2023-46218-640d5c49",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "70157023922273088324427000884924629680",
                "92437533074026318023754548512791708265",
                "174781051971824864692061611806535615933",
                "317717153087227730924384644852634401824",
                "320223818076096336606365255275427779195",
                "147452772515304361370177013713828761412",
                "163503535934513669771314972304392725527",
                "231785432830425780566036868222861730032",
                "286735239701402540127725202216210978251",
                "193259407853272010415575233417515494247",
                "49884205652123128562972741131269080654"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "target": {
            "file": "lib/cookie.c"
        },
        "source": "https://github.com/curl/curl.git/commit/2b0994c29a721c91c572cff7808c572a24d251eb",
        "signature_type": "Line"
    }
]
source 
"https://curl.se/docs/CURL-CVE-2023-46218.json"
vanir_signatures_modified 
"2026-05-29T05:40:24Z"