CVE-2026-8924

A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set 'super cookies' that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://curl.se/docs/CVE-2026-8924.html	Patch Vendor Advisory
https://curl.se/docs/CVE-2026-8924.json	Vendor Advisory
https://hackerone.com/reports/3733905	Exploit Issue Tracking Third Party Advisory
https://hackerone.com/reports/3733905	Exploit Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

History

07 Jul 2026, 23:06

Type	Values Removed	Values Added
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:a:haxx:curl::::::::
References	~~() https://curl.se/docs/CVE-2026-8924.html -~~	() https://curl.se/docs/CVE-2026-8924.html - Patch, Vendor Advisory
References	~~() https://curl.se/docs/CVE-2026-8924.json -~~	() https://curl.se/docs/CVE-2026-8924.json - Vendor Advisory
References	~~() https://hackerone.com/reports/3733905 -~~	() https://hackerone.com/reports/3733905 - Exploit, Issue Tracking, Third Party Advisory
First Time		Haxx curl Haxx

06 Jul 2026, 18:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1
References	~~() https://hackerone.com/reports/3733905 -~~	() https://hackerone.com/reports/3733905 -

03 Jul 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-03 07:16

Updated : 2026-07-07 23:06

NVD link : CVE-2026-8924

Mitre link : CVE-2026-8924

CVE.ORG link : CVE-2026-8924

JSON object : View

Products Affected

haxx

curl

CWE

NVD-CWE-noinfo

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"tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "A flaw in curl\u2019s cookie parsing logic allows a malicious HTTP server to set\n'super cookies' that bypass the Public Suffix List check. This enables an\nattacker-controlled origin to inject cookies that curl subsequently scopes and\ntransmits to unrelated third-party domains."}], "lastModified": "2026-07-07T23:06:00.797", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A9A9B86D-BB35-4B95-A062-A7A93A3B98FB", "versionEndExcluding": "8.21.0", "versionStartIncluding": "7.46.0"}], "operator": "OR"}]}], "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"}