Vulnerability DatabaseCVE-2026-8924
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CVE-2026-8924
Published:July 03, 2026
Updated:July 21, 2026
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.
Affected Packages
https://github.com/curl/curl.git (GITHUB):
Affected version(s) >=curl-7_46_0 <curl-8_21_0
Fix Suggestion:
Update to version curl-8_21_0
Related Resources (3)
https://hackerone.com/reports/3733905
https://curl.se/docs/CVE-2026-8924.html
https://curl.se/docs/CVE-2026-8924.json
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
EPSS
Base Score:
0.65