Is slim/slim 4.15 vulnerable?

Composer · 4 releases from 4.15.0 to 4.15.3 · latest slim/slim is 4.15.3 · checked 1 Nov 2026

No known advisories in the last release

slim/slim 4.15.3, the last 4.15 release, has no known advisories. 1 advisory affects earlier 4.15.x releases, so update to 4.15.3.

Update within 4.15:composer require slim/slim:^4.15.3

Is your project affected?

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

Fixed within 4.15.x, affecting earlier releases

  • MediumCVE-2026-48157GHSA-53h4-8rc4-f53923 Jun 2026

    Slim has Reflected XSS in the HtmlErrorRenderer

    Affected
    >=4.4.0 <4.15.2
    Fixed in
    4.15.2

Which of your client projects are still on slim/slim 4.15?

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Other slim/slim 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.