GHSA-vvj3-c3rp-c85p: phpunit/phpunit (CVE-2026-24765)

Package	Ecosystem	Affected	Fixed in
phpunit/phpunit	Packagist	<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	8.5.52, 9.6.33, 10.5.62, 11.5.50, 12.5.8

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

PHPUnit versions before 8.5.52, 9.0.0 through 9.6.33, 10.0.0 through 10.5.62, 11.0.0 through 11.5.50, and 12.0.0 through 12.5.8 are affected. An attacker with local file write access to the location where PHPUnit expects code coverage files for PHPT tests can place a malicious serialized .coverage file, which is unsafely deserialized and may lead to arbitrary code execution when tests run with coverage enabled. Upgrade to 8.5.52, 9.6.33, 10.5.62, 11.5.50, or 12.5.8, depending on your major version.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0038, the 33rd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:25 UTC First seen by agentprime
31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.