Is symfony/routing 5.4 vulnerable?

Composer · 26 releases from 5.4.0 to 5.4.55 · latest symfony/routing is 8.1.10 · checked 1 Nov 2026

No known advisories in the last release

symfony/routing 5.4.55, the last 5.4 release, has no known advisories. 2 advisories affect earlier 5.4.x releases, so update to 5.4.55.

Update within 5.4:composer require symfony/routing:^5.4.55

Is your project affected?

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

Fixed within 5.4.x, affecting earlier releases

  • MediumCVE-2026-48784GHSA-h5x3-xfc9-m39h15 Jun 2026

    Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

    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
  • MediumCVE-2026-45065GHSA-72xp-p242-47p927 May 2026

    Symfony has a UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection

    Affected
    <5.4.52 · >=6.0.0 <6.4.40 · >=7.0.0 <7.4.12 · >=8.0.0 <8.0.12
    Fixed in
    5.4.52, 6.4.40, 7.4.12, 8.0.12

Which of your client projects are still on symfony/routing 5.4?

NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact symfony/routing version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.

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Other symfony/routing 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.