CVE-2026-22190

The egg-mkfont utility in Panda3D versions up to and including 1.10.16 contains an uncontrolled format string vulnerability. The -gp (glyph pattern) command-line option is used directly as the format string for sprintf() with only a single argument supplied. If an attacker provides additional format specifiers, egg-mkfont may read unintended stack values and write the formatted output into generated .egg and .png files, resulting in disclosure of stack-resident memory and pointer values.

• https://github.com/panda3d/panda3d
• https://seclists.org/fulldisclosure/2026/Jan/11
• https://www.panda3d.org/
• https://www.vulncheck.com/advisories/panda3d-egg-mkfont-format-string-information-disclosure