CVE-2024-6611

Incorrect handling of SameSite cookies

State: Published
Severity: 9.8 Critical
Published: Jul 9, 2024
Updated: Oct 30, 2025
Reserved: Jul 9, 2024

Description

A nested iframe, triggering a cross-site navigation, could send SameSite=Strict or Lax cookies. This vulnerability affects Firefox < 128 and Thunderbird < 128.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-1275 Sensitive Cookie with Improper SameSite Attribute

Affected Products

Product	Versions
FirefoxMozilla	before 128Affected
ThunderbirdMozilla	before 128Affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1844827
https://www.mozilla.org/security/advisories/mfsa2024-29/
https://www.mozilla.org/security/advisories/mfsa2024-32/

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