Read the docs
TI-2018-08125 Aliases CVE-2018-11386GHSA-r2rq-3h56-fqm4

An issue was discovered in the HttpFoundation component in Symfony 2.7.x before 2.7.48…

Priority LOW 30CWE-613Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-613.

Summary

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.

Why it matters now

EPSS 0.01582 75th percentileScored 2026-11-07
Fix Fixed symfony/symfony (Packagist): 2.7.48, 2.8.41, 3.3.17 +2symfony/http-foundation (Packagist): 2.7.48, 2.8.41, 3.3.17 +2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—symfony/symfony (Packagist)2.7.0 to before 2.7.482.7.48Patch availableGHSA-r2rq-3h56-fqm4
—symfony/symfony (Packagist)2.8.0 to before 2.8.412.8.41Patch availableGHSA-r2rq-3h56-fqm4
—symfony/symfony (Packagist)3.3.0 to before 3.3.173.3.17Patch availableGHSA-r2rq-3h56-fqm4
—symfony/symfony (Packagist)3.4.0 to before 3.4.113.4.11Patch availableGHSA-r2rq-3h56-fqm4
—symfony/symfony (Packagist)4.0.0 to before 4.0.114.0.11Patch availableGHSA-r2rq-3h56-fqm4
—symfony/http-foundation (Packagist)2.7.0 to before 2.7.482.7.48Patch availableGHSA-r2rq-3h56-fqm4
—symfony/http-foundation (Packagist)2.8.0 to before 2.8.412.8.41Patch availableGHSA-r2rq-3h56-fqm4
—symfony/http-foundation (Packagist)3.3.0 to before 3.3.173.3.17Patch availableGHSA-r2rq-3h56-fqm4
—symfony/http-foundation (Packagist)3.4.0 to before 3.4.113.4.11Patch availableGHSA-r2rq-3h56-fqm4
—symfony/http-foundation (Packagist)4.0.0 to before 4.0.114.0.11Patch availableGHSA-r2rq-3h56-fqm4
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • symfony/symfony (Packagist) Vendor— Affected 2.7.0 to before 2.7.48 Fixed in 2.7.48 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/symfony (Packagist) Vendor— Affected 2.8.0 to before 2.8.41 Fixed in 2.8.41 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/symfony (Packagist) Vendor— Affected 3.3.0 to before 3.3.17 Fixed in 3.3.17 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/symfony (Packagist) Vendor— Affected 3.4.0 to before 3.4.11 Fixed in 3.4.11 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/symfony (Packagist) Vendor— Affected 4.0.0 to before 4.0.11 Fixed in 4.0.11 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/http-foundation (Packagist) Vendor— Affected 2.7.0 to before 2.7.48 Fixed in 2.7.48 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/http-foundation (Packagist) Vendor— Affected 2.8.0 to before 2.8.41 Fixed in 2.8.41 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/http-foundation (Packagist) Vendor— Affected 3.3.0 to before 3.3.17 Fixed in 3.3.17 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/http-foundation (Packagist) Vendor— Affected 3.4.0 to before 3.4.11 Fixed in 3.4.11 Patch available GHSA-r2rq-3h56-fqm4
  • symfony/http-foundation (Packagist) Vendor— Affected 4.0.0 to before 4.0.11 Fixed in 4.0.11 Patch available GHSA-r2rq-3h56-fqm4

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*2.7.0 to before 2.7.48; 2.8.0 to before 2.8.41; 3.3.0 to before 3.3.17; 3.4.0 to before 3.4.11; 4.0.0 to before 4.0.11Vulnerablesensiolabs
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions 2.7.0 to before 2.7.48; 2.8.0 to before 2.8.41; 3.3.0 to before 3.3.17; 3.4.0 to before 3.4.11; 4.0.0 to before 4.0.11 Vulnerable ·sensiolabs
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

  • Fix · GHSA-r2rq-3h56-fqm4 symfony/symfony (Packagist) Fixed in 2.7.48 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/symfony (Packagist) Fixed in 2.8.41 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/symfony (Packagist) Fixed in 3.3.17 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/symfony (Packagist) Fixed in 3.4.11 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/symfony (Packagist) Fixed in 4.0.11 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/http-foundation (Packagist) Fixed in 2.7.48 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/http-foundation (Packagist) Fixed in 2.8.41 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/http-foundation (Packagist) Fixed in 3.3.17 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/http-foundation (Packagist) Fixed in 3.4.11 Advisory →
  • Fix · GHSA-r2rq-3h56-fqm4 symfony/http-foundation (Packagist) Fixed in 4.0.11 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-11386
  2. 2026-10-03 Alias added: GHSA-r2rq-3h56-fqm4

References

Advisory 6

Other 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences