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Medium

Symfony DoS

  • Disclosed: 14.05.2022
  • Updated: 11.10.2026 10:22

An issue was discovered in the HttpFoundation 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. The PDOSessionHandler class allows storing sessions on a PDO connection. Under some configurations and with a well-crafted payload, it was possible to do a denial of service on a Symfony application without too much resources.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package symfony/http-foundation >= 2.7.0, < 2.7.48, >= 2.8.0, < 2.8.41, >= 3.3.0, < 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
Composer package symfony/symfony >= 2.7.0, < 2.7.48, >= 2.8.0, < 2.8.41, >= 3.3.0, < 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

References

CVSS score 5.9/10
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-613
Platform
Composer
Package
symfony/http-foundation, symfony/symfony
Disclosed
14.05.2022
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-r2rq-3h56-fqm4 - CC BY 4.0

Vulnerability history: symfony/http-foundation

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 (14) in the archive
Total entries
14
First → latest
12.2019 06.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 3
  • Medium 8
  • Low 2

Disclosures per year

Severity:
  1. Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass
    High · 7.3 CVE-2025-64500 < 5.4.50, >= 6.0.0, < 6.4.29, >= 7.0.0, < 7.3.7 5.4.50, 6.4.29, 7.3.7
  2. Symfony vulnerable to denial of service via a malicious HTTP Host header
    High · 7.5 CVE-2014-5244 >= 2.0.0, < 2.3.19, >= 2.4.0, < 2.4.9, >= 2.5.0, < 2.5.4 2.3.19, 2.4.9, 2.5.4
  3. Symfony DoS this entry
    Medium · 5.9 CVE-2018-11386 >= 2.7.0, < 2.7.48, >= 2.8.0, < 2.8.41, >= 3.3.0, < 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
  4. Invalid HTTP method overrides allow possible XSS or other attacks in Symfony
    Critical · 9.8 CVE-2019-10913 >= 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
  5. Argument injection in a MimeTypeGuesser in Symfony
    High · 7.5 CVE-2019-18888 >= 2.0.0, < 2.8.52, >= 3.0.0, < 3.4.35, >= 4.0.0, < 4.2.12, >= 4.3.0, < 4.3.8 2.8.52, 3.4.35, 4.2.12, 4.3.8

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