What’s Vulnerable › Vulnerabilities

CVE-2020-6623

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-08 · updated 2026-06-17
• Weakness: CWE-617

Description

stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.

Affected products

• nothings Stb Truetype.H: through 1.22

References

• https://github.com/nothings/stb/issues/865
• https://github.com/nothings/stb/issues/865

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