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Package details: pkg:composer/symfony/http-kernel@5.2.4
purl pkg:composer/symfony/http-kernel@5.2.4
Next non-vulnerable version 5.4.20
Latest non-vulnerable version 6.2.6
Risk 3.1
Vulnerabilities affecting this package (3)
Vulnerability Summary Fixed by
VCID-e71e-d4tr-wqgz
Aliases:
CVE-2021-21424
GHSA-5pv8-ppvj-4h68
Prevent user enumeration using Guard or the new Authenticator-based Security Description ----------- The ability to enumerate users was possible without relevant permissions due to different exception messages depending on whether the user existed or not. It was also possible to enumerate users by using a timing attack, by comparing time elapsed when authenticating an existing user and authenticating a non-existing user. Resolution ---------- We now ensure that 403s are returned whether the user exists or not if the password is invalid or if the user does not exist. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011) for branch 3.4. Credits ------- I would like to thank James Isaac and Mathias Brodala for reporting the issue and Robin Chalas for fixing the issue.
5.2.8
Affected by 2 other vulnerabilities.
VCID-n3d2-zwve-gbf5
Aliases:
CVE-2021-41267
GHSA-q3j3-w37x-hq2q
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') `Symfony/Http-Kernel` is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the `trusted_headers` allowed list are ignored and protect users from Cache poisoning attacks. In Symfony, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the `trusted_headers` allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue.
5.3.12
Affected by 1 other vulnerability.
5.4.0-BETA1
Affected by 1 other vulnerability.
VCID-rgh3-ef8t-k3ec
Aliases:
CVE-2022-24894
GHSA-h7vf-5wrv-9fhv
GMS-2023-209
GMS-2023-212
Duplicate This advisory duplicates another.
5.4.20
Affected by 0 other vulnerabilities.
6.0.0-BETA1
Affected by 0 other vulnerabilities.
6.0.20
Affected by 0 other vulnerabilities.
6.1.0-BETA1
Affected by 0 other vulnerabilities.
6.1.12
Affected by 0 other vulnerabilities.
6.2.0-BETA1
Affected by 0 other vulnerabilities.
6.2.6
Affected by 0 other vulnerabilities.
Vulnerabilities fixed by this package (0)
Vulnerability Summary Aliases
This package is not known to fix vulnerabilities.

Date Actor Action Vulnerability Source VulnerableCode Version
2026-04-16T22:20:59.932083+00:00 GitLab Importer Affected by VCID-rgh3-ef8t-k3ec https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/GMS-2023-209.yml 38.4.0
2026-04-16T21:35:21.373369+00:00 GitLab Importer Affected by VCID-n3d2-zwve-gbf5 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-41267.yml 38.4.0
2026-04-16T21:22:54.497450+00:00 GitLab Importer Affected by VCID-e71e-d4tr-wqgz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-21424.yml 38.4.0
2026-04-11T23:38:58.586852+00:00 GitLab Importer Affected by VCID-rgh3-ef8t-k3ec https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/GMS-2023-209.yml 38.3.0
2026-04-11T22:48:54.818025+00:00 GitLab Importer Affected by VCID-n3d2-zwve-gbf5 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-41267.yml 38.3.0
2026-04-11T22:35:33.060444+00:00 GitLab Importer Affected by VCID-e71e-d4tr-wqgz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-21424.yml 38.3.0
2026-04-02T23:43:12.330880+00:00 GitLab Importer Affected by VCID-rgh3-ef8t-k3ec https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/GMS-2023-209.yml 38.1.0
2026-04-02T22:58:27.399675+00:00 GitLab Importer Affected by VCID-n3d2-zwve-gbf5 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-41267.yml 38.1.0
2026-04-02T22:46:36.766500+00:00 GitLab Importer Affected by VCID-e71e-d4tr-wqgz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-21424.yml 38.1.0
2026-04-01T18:06:03.136008+00:00 GitLab Importer Affected by VCID-rgh3-ef8t-k3ec https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/GMS-2023-209.yml 38.0.0
2026-04-01T17:17:02.752259+00:00 GitLab Importer Affected by VCID-n3d2-zwve-gbf5 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-41267.yml 38.0.0
2026-04-01T17:04:32.685850+00:00 GitLab Importer Affected by VCID-e71e-d4tr-wqgz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/symfony/http-kernel/CVE-2021-21424.yml 38.0.0