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GHSA-jgvr-6x5w-hx5w

MediumCVSS 6.9 / 10
Published Aug 20, 2026·Last modified Aug 20, 2026
Affected Components(2)
crates.io logokcl-lib
< 0.3.129
PyPI logozoo-kcl
< 0.3.129
Description

Impact

Feeding a KCL program that wraps an expression in deep, unnecessary parentheses triggers the parser’s recursive expression -> unnecessarily_bracketed -> expression path. With enough nesting, the call stack grows until it exceeds the process stack limit, causing a stack overflow.

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Risk Scores
Base Score
6.9

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
2.7

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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