GHSA-f74j-gffq-vm9p: pyquokka (CVE-2025-62515)

Package	Ecosystem	Affected	Fixed in
pyquokka	PyPI	<=0.3.1	No fixed version yet

Machine-written summary

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

pyquokka versions up to and including 0.3.1 are vulnerable to remote code execution through the FlightServer class, whose do_action() method passes client-supplied action bodies directly to pickle.loads(). An attacker with network access to a FlightServer bound to a reachable interface, such as 0.0.0.0, can send a crafted pickle payload through the set_configs action and run arbitrary code on the server. No fixed version is listed. Bind the server to 127.0.0.1 instead of 0.0.0.0 and restrict network access to it.

Written 10 Nov 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
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0089, the 59th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 29 Jun 2026. New records show when each source confirmed them.

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.