EUVD-2026-60955Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector with high complexity because exploitation requires both a glob-containing version string and a matching file in the working directory simultaneously; low privileges to write .python-version; no availability impact.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Pyenv's version-selection shell scripts silently redirect Python interpreter selection to an unintended installed version when the PYENV_VERSION or .python-version value contains shell glob metacharacters and a matching file exists in the working directory. All seven libexec scripts (pyenv-version-name, pyenv-which, pyenv-prefix, pyenv-local, pyenv-global, pyenv-version, pyenv-versions) expand the version string without disabling glob expansion via set -f, allowing pathname expansion against the current directory's contents. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three simultaneous local conditions: (1) the attacker must control the content of a .python-version file or the PYENV_VERSION environment variable and be able to insert shell glob metacharacters (*, ?, [, ]) into the version string; (2) a file matching that glob pattern must exist in the current working directory at the time any affected pyenv command runs; (3) pyenv must be running a version earlier than 2.8.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 2.0 with vector AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L accurately represents a low-severity finding. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade pyenv to version 2.8.0 or later, which is the vendor-confirmed patched release available at https://github.com/pyenv/pyenv/releases/tag/v2.8.0. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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