CVE-2026-8924
9.1
CRITICAL
CVSS 3.1
EPSS 0.65%
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.
How to fix CVE-2026-8924
To remediate CVE-2026-8924, upgrade the affected package to a fixed version below.
- Alpine/curl—upgrade to 8.21.0-r0 or later
Is CVE-2026-8924 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 7.46.0, < 8.21.0-r0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |