GHSA-cx28-75q4-x26q: virtualenv (CVE-2026-113717)

Package	Ecosystem	Affected	Fixed in
virtualenv	PyPI	<21.14.9	21.14.9

Machine-written summary

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

virtualenv versions before 21.14.9 (PyPI) skip wheel digest verification when the pip seeder is used with the download option, so an index wheel matching a bundled wheel's name and version can be selected without comparison against PyPI metadata. The source says exploitation needs the pip seeder and download option, and a non-PyPI index configured in pip.conf; it notes this does not establish index control in the default PyPI setup. Upgrade to virtualenv 21.14.9, which is listed as the fix.

Written 31 Oct 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
2.3	Low	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0029, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:07 UTC First seen by agentprime
31 Oct 2026, 14:07 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.