CVE-2026-8924 | Severity.io

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.

Related CPE's

Vulnerable

References

https://curl.se/docs/CVE-2026-8924.html

PatchVendor Advisory

https://curl.se/docs/CVE-2026-8924.json

Vendor Advisory

https://hackerone.com/reports/3733905

ExploitIssue TrackingThird Party Advisory

https://hackerone.com/reports/3733905

ExploitIssue TrackingThird Party Advisory

Weaknesses

2499f714-1537-4658-8207-48ae4bb9eae9

Secondary

CWE-201

[email protected]

Primary

NVD-CWE-noinfo

CVSS impact metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

9.1 · Critical

Information

Source identifier

2499f714-1537-4658-8207-48ae4bb9eae9

Vulnerability status

Modified

Published

2026-07-03T07:16:24.793Z

3 months ago

Last modified

2026-09-15T07:16:32.573Z

3 weeks ago