What’s Vulnerable › Vulnerabilities

CVE-2026-22189: Panda3D <= 1.10.16 egg-mkfont Stack Buffer Overflow

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-07 · updated 2026-07-14
• Weakness: CWE-121

Description

The egg-mkfont utility in Panda3D versions up to and including 1.10.16 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.

Affected products

• Panda3D: through 1.10.16

References

• https://github.com/panda3d/panda3d
• https://seclists.org/fulldisclosure/2026/Jan/10
• https://www.panda3d.org/
• https://www.vulncheck.com/advisories/panda3d-egg-mkfont-stack-buffer-overflow

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