Which versions of Panda3d are affected by CVE-2026-22189?

Organizations using Panda3D versions up to and including 1.10.16 egg-mkfont face critical risk from CVE-2026-22189, a stack-based buffer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2026-22189?

Yes, a public proof-of-concept exploit is available for CVE-2026-22189. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-22189?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Panda3d CVE-2026-22189

Q: What is the CVSS score of CVE-2026-22189?

CVE-2026-22189 has a CVSS 4.0 base score of 6.9 (Medium). CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

MEDIUM

Stack-based Buffer Overflow (CWE-121)

2026-01-07 disclosure@vulncheck.com

Buffer Overflow Stack Overflow RCE Panda3d

6.9

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

6.9 MEDIUM

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

May 26, 2026 - 14:22 NVD

CRITICAL MEDIUM

CVSS changed

May 26, 2026 - 14:22 NVD

9.8 (CRITICAL) 6.9 (MEDIUM)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 12, 2026 - 17:59 vuln.today

Public exploit code

CVE Published

Jan 07, 2026 - 21:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Panda3D egg-mkfont (through 1.10.16) has a stack buffer overflow via an unbounded sprintf() with attacker-controlled glyph pattern input. PoC available.

Technical ContextAI

The egg-mkfont tool formats user-supplied glyph pattern (-gp flag) into a fixed-size stack buffer using sprintf() without length checking (CWE-121). An excessively long pattern overflows the stack buffer, overwriting the return address and enabling attacker-controlled code execution.