Is phpunit/phpunit 5.6 vulnerable?

Composer · 9 releases from 5.6.0 to 5.6.8 · latest phpunit/phpunit is 13.4.6 · checked 3 Nov 2026

Yes: 1 known advisory

Yes. phpunit/phpunit 5.6.8, the last 5.6 release, is affected by 1 known security advisory (1 high), including CVE-2026-24765. 1 more affects earlier 5.6.x releases. Upgrade to 8.5.52 or later to fix all of them.

Upgrade with:composer require phpunit/phpunit:^8.5.52

Is your project affected?

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

Advisories affecting phpunit/phpunit 5.6.8

  • HighCVE-2026-24765GHSA-vvj3-c3rp-c85p27 Jan 2026

    PHPUnit Vulnerable to Unsafe Deserialization in PHPT Code Coverage Handling

    Affected
    <8.5.52 · >=9.0.0 <9.6.33 · >=10.0.0 <10.5.62 · >=11.0.0 <11.5.50 · >=12.0.0 <12.5.8
    Fixed in
    8.5.52, 9.6.33, 10.5.62, 11.5.50, 12.5.8

Fixed within 5.6.x, affecting earlier releases

  • CriticalCVE-2017-9841GHSA-r7c9-c69m-rph826 Mar 2022

    Code Injection in PHPUnit

    Affected
    >=4.8.19 <4.8.28 · >=5.0.10 <5.6.3
    Fixed in
    4.8.28, 5.6.3

Which of your client projects are still on phpunit/phpunit 5.6?

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Other phpunit/phpunit 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.