CVE-2026-68939CWE-155CWE-78CWE-88command-injection

CVE-2026-68939

published August 18, 2026

CVSS

2.0

EPSS

Percentile

6.6

In the wild

Unconfirmed

What it is

Pyenv provides simple Python version management. Prior to 2.8.0, is_version_safe() in libexec/pyenv-version-file-read accepts shell glob metacharacters in .python-version values, and unquoted PYENV_VERSION expansion in libexec/pyenv-version-name, libexec/pyenv-which, libexec/pyenv-prefix, libexec/pyenv-local, libexec/pyenv-global, libexec/pyenv-version, and libexec/pyenv-versions pathname-expands the value against the current directory, allowing a matching attacker-controlled file to silently select a different installed interpreter or version. This issue is fixed in version 2.8.0.

The record

Technical detail

CVSS: 2.0 · NONE
CVSS v4.0: 2.0 · CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS: 0.00171 · 6.6th percentile
Weaknesses: CWE-155 · Improper Neutralization of Wildcards or Matching Symbols; CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'); CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published: 2026-08-18T19:17Z

References (4)

https://github.com/pyenv/pyenv/commit/95df7dbc7b34595b47c9b922de198547effda819 · [email protected]https://github.com/pyenv/pyenv/releases/tag/v2.8.0 · [email protected]https://github.com/pyenv/pyenv/security/advisories/GHSA-g478-f579-9vp9 · [email protected]https://github.com/pyenv/pyenv/security/advisories/GHSA-g478-f579-9vp9 · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

18 AUG 15:11Z
Pyenv: Glob/wildcard metacharacters bypass is_version_safe(), causing silent version/interpreter substitution via unquoted expansion (CVE-2022-35861 residual)
cvelistv5