CVE-2018-14774

Name: CVE-2018-14774
Creator: NVD / NIST
Published: 2018-08-03T17:29:00.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.15%

Last modified Jun 17, 2026

CVE-2018-14774 is a vulnerability of currently unknown severity. An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.

Metrics

EPSS Probability

1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Sensiolabs	Symfony	>= 2.7.0, <= 2.7.48
Sensiolabs	Symfony	>= 2.8.0, <= 2.8.43
Sensiolabs	Symfony	>= 3.3.0, <= 3.3.17
Sensiolabs	Symfony	>= 3.4.0, <= 3.4.13
Sensiolabs	Symfony	>= 4.0.0, <= 4.0.13
Sensiolabs	Symfony	>= 4.1.0, <= 4.1.2

References

https://github.com/symfony/symfony/commit/725dee4cd8b4ccd52e335ae4b4522242cea9bd4aIssue Tracking, Patch, Third Party Advisory
https://symfony.com/blog/cve-2018-14774-possible-host-header-injection-when-using-httpcachePatch, Third Party Advisory
https://github.com/symfony/symfony/commit/725dee4cd8b4ccd52e335ae4b4522242cea9bd4aIssue Tracking, Patch, Third Party Advisory
https://symfony.com/blog/cve-2018-14774-possible-host-header-injection-when-using-httpcachePatch, Third Party Advisory

Timeline

Published: Aug 3, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-14774?

How severe is CVE-2018-14774?

Severity scoring for CVE-2018-14774 is pending analysis. The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2018-14774?

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.

Are you affected by CVE-2018-14774?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST