GHSA-494p-63j8-28p3: virtualenv (CVE-2026-113714)

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 select downloaded wheels from pip's textual output and keep files in the reusable wheel cache even when digest verification fails. An attacker who can control the package index, or who already has some control over downloaded data, could get a rejected or modified wheel reused later, though the source says this does not bypass TLS and needs extra conditions. Upgrade to virtualenv 21.14.9, which verifies downloads in a private temporary directory before promotion; until then, discard the download cache after a failed verification.

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 0.0025, the 16th 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.