Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.46.0, < 8.21.0 |
References
- https://curl.se/docs/CVE-2026-8924.htmlPatchVendor Advisory
- https://curl.se/docs/CVE-2026-8924.jsonVendor Advisory
- https://hackerone.com/reports/3733905ExploitIssue TrackingThird Party Advisory
- https://hackerone.com/reports/3733905ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2026-8924?
CVE-2026-8924 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 ...
How severe is CVE-2026-8924?
CVE-2026-8924 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-8924?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Curl.