Vulnerability · Published Jan 7, 2026 · Assigned by VulnCheck

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

Medium 6.9

In plain English

A medium-severity stack buffer overflow in Panda3D from Panda3D. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.5%top 55.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Panda3D	Panda3D	0 – through 1.10.16

Weakness: CWE-121 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://seclists.org/fulldisclosure/2026/Jan/10 technical-description, exploit
https://www.panda3d.org/ product
https://github.com/panda3d/panda3d product
https://www.vulncheck.com/advisories/panda3d-egg-mkfont-stack-buffer-overflow third-party-advisory