Vulnerability in Cmu Panda3d
CVE-2026-22188
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Cmu Panda3d
- Panda3d — versions 0
Weakness classification (CWE)
References
- seclists.org/fulldisclosure/2026/Jan/9 (Exploit, technical-description, Mailing List, Third Party Advisory, exploit)
- www.panda3d.org/ (Product, product)
- github.com/panda3d/panda3d (Product, product)
- www.vulncheck.com/advisories/panda3d-deploy-stub-stack-exhaustion-via-unbounded… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-22188?
- CVE-2026-22188 is a medium-severity vulnerability in Cmu Panda3d, classified under CWE-457. CVSS score: 5.5/10. Published 2026-01-07.
- How severe is CVE-2026-22188?
- Medium severity. CVSS v3 base score is 5.5 out of 10.