CVE-2026-8924
Last modified
CVE-2026-8924 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.56% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.46.0, < 8.21.0 |
References
- https://curl.se/docs/CVE-2026-8924.htmlPatch, Vendor Advisory
- https://curl.se/docs/CVE-2026-8924.jsonVendor Advisory
- https://hackerone.com/reports/3733905Exploit, Issue Tracking, Third Party Advisory
- https://hackerone.com/reports/3733905Exploit, Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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