CVE-2026-22189

Panda3D versions up to and including 1.10.16 egg-mkfont contains a stack-based buffer overflow vulnerability due to use of an unbounded sprintf() call with attacker-controlled input. When constructing glyph filenames, egg-mkfont formats a user-supplied glyph pattern (-gp) into a fixed-size stack buffer without length validation. Supplying an excessively long glyph pattern string can overflow the stack buffer, resulting in memory corruption and a deterministic crash. Depending on build configuration and execution environment, the overflow may also be exploitable for arbitrary code execution.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/panda3d/panda3d	Product
https://seclists.org/fulldisclosure/2026/Jan/10	Exploit Mailing List Third Party Advisory
https://www.panda3d.org/	Product
https://www.vulncheck.com/advisories/panda3d-egg-mkfont-stack-buffer-overflow	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:cmu:panda3d:*:*:*:*:*:*:*:*

History

12 Jan 2026, 17:59

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
CPE		cpe:2.3:a:cmu:panda3d::::::::
CWE		CWE-787
First Time		Cmu Cmu panda3d
References	~~() https://github.com/panda3d/panda3d -~~	() https://github.com/panda3d/panda3d - Product
References	~~() https://seclists.org/fulldisclosure/2026/Jan/10 -~~	() https://seclists.org/fulldisclosure/2026/Jan/10 - Exploit, Mailing List, Third Party Advisory
References	~~() https://www.panda3d.org/ -~~	() https://www.panda3d.org/ - Product
References	~~() https://www.vulncheck.com/advisories/panda3d-egg-mkfont-stack-buffer-overflow -~~	() https://www.vulncheck.com/advisories/panda3d-egg-mkfont-stack-buffer-overflow - Third Party Advisory

07 Jan 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-07 21:16

Updated : 2026-01-12 17:59

NVD link : CVE-2026-22189

Mitre link : CVE-2026-22189

CVE.ORG link : CVE-2026-22189

JSON object : View

Products Affected

cmu

panda3d

CWE

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

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