CVE-2026-113717 virtualenv: Pip seeding with download omits wheel digest verification
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-113717?
CVE-2026-113717 is a low-severity vulnerability in pypa virtualenv, published on 20 Oct 2026.
Official description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, PipInvoke.get_pip_install_cmd() handles --seeder pip --download by calling get_wheel(download=False) and then allowing pip to consult the configured index, bypassing virtualenv's download_wheel() and verify_wheel_digest() path. When virtualenv's default-index PyPI digest comparison remains enabled, an index candidate matching the bundled package and version can therefore be selected without comparison to PyPI SHA-256 metadata. Explicit custom-index settings already opt out of that comparison and remain outside this verification-bypass claim; the demonstrated configuration used a non-PyPI index while leaving the index environment variables unset so the comparison policy remained active. This condition does not independently defeat TLS or establish control of the index response. This issue is fixed in version 21.14.9.
Weakness: CWE-494
Which versions are affected by CVE-2026-113717?
3 open source packages ship an affected version, including virtualenv.
| Package | Affected | Fixed in |
|---|---|---|
virtualenv Bitnami | All versions | 21.14.9 |
virtualenv PyPI | All versions | 21.14.9 |
virtualenv PyPI | All versions | 21.14.9 |
How do I fix CVE-2026-113717?
Upgrade virtualenv to 21.14.9 or later.
Is CVE-2026-113717 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-113717 exists.
Sources
Also known as BIT-virtualenv-2026-113717, DEBIAN-CVE-2026-113717, ECHO-39b2-6d9f-c795, GHSA-cx28-75q4-x26q, MINI-q853-5qm6-353q, UBUNTU-CVE-2026-113717.