GHSA-22qq-2fwx-7p67: pylint (CVE-2026-114608)

Package	Ecosystem	Affected	Fixed in
pylint	PyPI	<4.0.9	4.0.9

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Pylint versions before 4.0.9 are vulnerable because they store cached stats as Python pickles in PYLINT_HOME and load them with pickle.load on later runs. An attacker who can write to the cache directory, such as a predictable PYLINT_HOME on a shared multi-user host, could plant a crafted pickle and run arbitrary code when pylint reads it. Upgrade to pylint 4.0.9 or later, which stores the cache as JSON, and until then avoid pointing PYLINT_HOME at untrusted, shared, or group-writable directories.

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
5.4	Medium	4.0	CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0011, the 1st 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.