How severe is CVE-2026-22189?

CVE-2026-22189 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-22189 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22189?

CVE-2026-22189 affects Cmu Panda3d. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22189?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-22189 have an EU (EUVD) identifier?

Yes. CVE-2026-22189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1168.

When was CVE-2026-22189 published?

CVE-2026-22189 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-22189

CVE-2026-22189 is a critical-severity vulnerability in Cmu Panda3d with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 6.9
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1168
Weakness: CWE-787
Affected product: Cmu Panda3d
Published: 2026-01-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-22189?: 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.
How severe is CVE-2026-22189?: CVE-2026-22189 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-22189 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22189?: CVE-2026-22189 affects Cmu Panda3d. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22189?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-22189 have an EU (EUVD) identifier?: Yes. CVE-2026-22189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1168.
When was CVE-2026-22189 published?: CVE-2026-22189 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (1)

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

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CVE-2026-22190 — High (CVSS 7.5): The egg-mkfont utility in Panda3D versions up to and including 1.10.16 contains an uncontrolled format string…
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