GHSA-jgvr-6x5w-hx5w: zoo-kcl

Zoo Design Studio: Recursive KCL parsing is vulnerable to denial-of-service

CVSS 4.0, no score published

Published by the GitHub Advisory Database at 20 Aug 2026, 18:34 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
zoo-kcl	PyPI	<0.3.129	0.3.129
kcl-lib	crates.io	<0.3.129	0.3.129

Identifiers

GHSA-jgvr-6x5w-hx5w

Weakness (CWE)

CWE-770

Machine-written summary

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

Zoo Design Studio's KCL parser is vulnerable to denial of service in zoo-kcl (PyPI) and kcl-lib (crates.io) before 0.3.129. A KCL program with deeply nested, unnecessary parentheses causes recursive parsing to overflow the stack and crash the process. Upgrade zoo-kcl and kcl-lib to 0.3.129 or later.

Written 5 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
Not published	None	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:39 UTC First seen by agentprime
31 Oct 2026, 14:39 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.