---
id: CVE-2026-22188
title: >-
  The deploy-stub component in Panda3D versions up to and including 1.10.16
  contains a denial of service vulnerability due to unbounded stack allocation
summary: >-
  The deploy-stub component in Panda3D versions up to and including 1.10.16
  contains a denial of service vulnerability due to unbounded stack allocation.
  The deploy-stub executable allocates argv_copy and argv_copy2 using alloca()
  based di…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-457
  - CWE-789
  - CWE-908
vendor: cmu
product: panda3d
affected:
  - panda3d <= 1.10.16
published: '2026-01-07'
updated: '2026-07-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-22188'
references:
  - url: 'https://github.com/panda3d/panda3d'
    label: disclosure@vulncheck.com
  - url: 'https://seclists.org/fulldisclosure/2026/Jan/9'
    label: disclosure@vulncheck.com
  - url: 'https://www.panda3d.org/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/panda3d-deploy-stub-stack-exhaustion-via-unbounded-alloca
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00204
epssPercentile: 0.0913
ingestedAt: '2026-07-15T13:44:03.801Z'
---

## Overview

The deploy-stub component in Panda3D versions up to and including 1.10.16 contains a denial of service vulnerability due to unbounded stack allocation. The deploy-stub executable allocates argv_copy and argv_copy2 using alloca() based directly on the attacker-controlled argc value without validation. Supplying a large number of command-line arguments can exhaust stack space and propagate uninitialized stack memory into Python interpreter initialization, resulting in a reliable crash and undefined behavior.

## Affected

- `panda3d <= 1.10.16`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.