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CVE-2026-8924

critical CVSS 9.1 EPSS 0.7%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-8924 applies to, and the release that fixes it where the sources name one.

At a glance

Severity
Critical
CVSS base score
9.1 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.7% probability of exploitation in the next 30 days, higher than 50% of scored vulnerabilities
Weakness
CWE-201
Published
2026-07-03

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