CVE-2018-11406: An issue was discovered in the Security component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4...

Description

An issue was discovered in the Security component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. By default, a user's session is invalidated when the user is logged out. This behavior can be disabled through the invalidate_session option. In this case, CSRF tokens were not erased during logout which allowed for CSRF token fixation.

Metrics

EPSS Probability

0.76%

50.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Sensiolabs	Symfony	>= 2.7.0, < 2.7.48
Sensiolabs	Symfony	>= 2.8.0, < 2.8.41
Sensiolabs	Symfony	>= 3.3.0, < 3.3.17
Sensiolabs	Symfony	>= 3.4.0, < 3.4.11
Sensiolabs	Symfony	>= 4.0.0, < 4.0.11
Debian	Debian Linux	9.0

References

Timeline

Published: Jun 13, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-11406?

An issue was discovered in the Security component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. By default, a user's session is invalidated when the user is logged out. This behavior can be disabled through the invalidate_session option. In this case, CSRF tokens were not erased during logout which allowed for CSRF token fixation.

How severe is CVE-2018-11406?

Severity scoring for CVE-2018-11406 is pending analysis. The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2018-11406?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.