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High

Symfony has an Authentication Bypass via RememberMe

  • Disclosed: 13.11.2024
  • Updated: 11.10.2026 10:22

Description

When consuming a persisted remember-me cookie, Symfony does not check if the username persisted in the database matches the username attached with the cookie, leading to authentication bypass.

Resolution

The PersistentRememberMeHandler class now ensures the submitted username is the cookie owner.

The patch for this issue is available here for branch 5.4.

Credits

We would like to thank Moritz Rauch - Pentryx AG for reporting the issue and Jérémy Derussé for providing the fix.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package symfony/security-http >= 5.3.0, < 5.4.47, >= 6.0.0-BETA1, < 6.4.15, >= 7.0.0-BETA1, < 7.1.8 5.4.47, 6.4.15, 7.1.8

References

CVSS score 7.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-287, CWE-289
Platform
Composer
Package
symfony/security-http
Disclosed
13.11.2024
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-cg23-qf8f-62rr - CC BY 4.0

Vulnerability history: symfony/security-http

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (20) in the archive
Total entries
20
First → latest
12.2019 06.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 10
  • Medium 8
  • Low 2

Disclosures per year

Severity:
  1. Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes
    High CVE-2026-48489 < 5.4.53, >= 6.0.0, < 6.4.41, >= 7.0.0, < 7.4.13, >= 8.0.0, < 8.0.13 5.4.53, 6.4.41, 7.4.13, 8.0.13
  2. Symfony's HEAD Request Bypasses methods: ['GET'] Filter in #[IsGranted] / #[IsSignatureValid] / #[IsCsrfTokenValid]
    High CVE-2026-45075 >= 7.4.0, < 7.4.12, >= 8.0.0, < 8.0.12 7.4.12, 8.0.12
  3. Symfony Vulnerable to Identity Spoofing via Unanchored DN Regex in X509Authenticator
    High CVE-2026-45063 < 5.4.52, >= 6.0.0-BETA1, < 6.4.40, >= 7.0.0-BETA1, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12 5.4.52, 6.4.40, 7.4.12, 8.0.12
  4. Symfony has an Authentication Bypass via RememberMe this entry
    High · 7.5 CVE-2024-51996 >= 5.3.0, < 5.4.47, >= 6.0.0-BETA1, < 6.4.15, >= 7.0.0-BETA1, < 7.1.8 5.4.47, 6.4.15, 7.1.8
  5. Symphony Denial of Service Via Overlong Usernames
    High · 7.5 CVE-2016-4423 >= 2.3.0, < 2.3.41, >= 2.4.0, < 2.7.13, >= 2.8.0, < 2.8.6, >= 3.0.0, < 3.0.6 2.3.41, 2.7.13, 2.8.6, 3.0.6
  6. Symfony Vulnerable to Timing Attack
    High CVE-2015-8125 >= 2.4.0, < 2.6.12, >= 2.7.0, < 2.7.7 2.6.12, 2.7.7
  7. Symfony Session Fixation Vulnerability
    High · 8.1 CVE-2018-11385 >= 2.7.0, < 2.7.48, >= 2.8.0, < 2.8.41, >= 3.0.0, < 3.3.17, >= 3.4.0, < 3.4.11, >= 4.0.0, < 4.0.11 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  8. Symfony CSRF Token Fixation
    High · 8.8 CVE-2018-11406 >= 2.7.0, < 2.7.48, >= 2.8.0, < 2.8.41, >= 3.0.0, < 3.3.17, >= 3.4.0, < 3.4.11, >= 4.0.0, < 4.0.11 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  9. Firewall configured with unanimous strategy was not actually unanimous in Symfony
    High · 7.6 CVE-2020-5275 >= 4.4.0, < 4.4.7, >= 5.0.0, < 5.0.7 4.4.7, 5.0.7
  10. Improper authentication in Symfony
    High · 7.5 CVE-2019-10911 >= 2.7.0, < 2.7.51, >= 2.8.0, < 2.8.50, >= 3.0.0, < 3.4.26, >= 4.0.0, < 4.1.12, >= 4.2.0, < 4.2.7 2.7.51, 2.8.50, 3.4.26, 4.1.12, 4.2.7

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