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

No history.

Information

Published : 2026-07-03 07:16

Updated : 2026-09-15 07:16

NVD link : CVE-2026-8924

Mitre link : CVE-2026-8924

CVE.ORG link : CVE-2026-8924

JSON object : View

Products Affected

haxx

curl

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

NVD-CWE-noinfo

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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": "2026-09-15T07:16:32.573", "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"}