What’s Vulnerable › Vulnerabilities

CVE-2026-114608: Pylint: Arbitrary code execution via pickle deserialization of the stats cache in PYLINT_HOME

• Severity: medium (CVSS 5.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-29
• Weakness: CWE-502

Description

Pylint is a static code analyser for Python. From 0.15.2 until 4.0.9, Pylint stores module statistics in predictable files under PYLINT_HOME and loads those files with pickle.load on a later run. An attacker who can write to a shared, group-writable, or otherwise untrusted cache directory can replace a stats cache with crafted serialized data, causing arbitrary code to execute with the privileges of the user who next runs Pylint. The default per-user cache is not normally writable by another user. This issue is fixed in version 4.0.9.

Affected products

• pylint-dev pylint: before 4.0.9

References

• https://github.com/pylint-dev/pylint/commit/58c87cffca9de2b3e89aa07b89686cbc90cfea2d
• https://github.com/pylint-dev/pylint/commit/5b241f66318220e9ba7b21ca631fbfe8e77682ca
• https://github.com/pylint-dev/pylint/releases/tag/v4.0.9
• https://github.com/pylint-dev/pylint/security/advisories/GHSA-22qq-2fwx-7p67

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