Is symfony/security-http 2.6 vulnerable?

Composer · 14 releases from 2.6.0 to 2.6.13 · latest symfony/security-http is 8.1.10 · checked 2 Nov 2026

Yes: 3 known advisories

Yes. symfony/security-http 2.6.13, the last 2.6 release, is affected by 3 known security advisories (3 high), including CVE-2026-48489, CVE-2026-45063, CVE-2016-4423. 2 more affect earlier 2.6.x releases. Upgrade to 5.4.53 or later to fix all of them.

Upgrade with:composer require symfony/security-http:^5.4.53

Is your project affected?

Private repo? Upload its lockfile instead, or connect GitHub to check every repo.

Advisories affecting symfony/security-http 2.6.13

  • HighCVE-2026-48489GHSA-6h46-9jf5-q59x15 Jun 2026

    Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes

    Affected
    <5.4.53 · >=6.0.0 <6.4.41 · >=7.0.0 <7.4.13 · >=8.0.0 <8.0.13
    Fixed in
    5.4.53, 6.4.41, 7.4.13, 8.0.13
  • HighCVE-2026-45063GHSA-ph86-p8f6-f9r227 May 2026

    Symfony Vulnerable to Identity Spoofing via Unanchored DN Regex in X509Authenticator

    Affected
    <5.4.52 · >=6.0.0-BETA1 <6.4.40 · >=7.0.0-BETA1 <7.4.12 · >=8.0.0-BETA1 <8.0.12
    Fixed in
    5.4.52, 6.4.40, 7.4.12, 8.0.12
  • HighCVE-2016-4423GHSA-whgv-8cg3-7hcm17 May 2022

    Symphony Denial of Service Via Overlong Usernames

    Affected
    >=2.3.0 <2.3.41 · >=2.4.0 <2.7.13 · >=2.8.0 <2.8.6 · >=3.0.0 <3.0.6
    Fixed in
    2.3.41, 2.7.13, 2.8.6, 3.0.6

Fixed within 2.6.x, affecting earlier releases

  • HighCVE-2015-8125GHSA-g97c-jfx6-xvxh17 May 2022

    Symfony Vulnerable to Timing Attack

    Affected
    >=2.4.0 <2.6.12 · >=2.7.0 <2.7.7
    Fixed in
    2.6.12, 2.7.7
  • LowCVE-2015-8124GHSA-j5jh-hpr4-h33214 May 2022

    Symfony Session Fixation Vulnerability

    Affected
    >=2.4.0 <2.6.12 · >=2.7.0 <2.7.7
    Fixed in
    2.6.12, 2.7.7

Which of your client projects are still on symfony/security-http 2.6?

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Other symfony/security-http versions

Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the Composer registry. Refreshed daily.