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TI-2020-05447 Aliases CVE-2020-6620GHSA-r4r4-cp78-rh67

stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_get8.

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_get8.

Why it matters now

EPSS 0.01143 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*up to 1.22Vulnerablenothings
  • cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:* Versions up to 1.22 Vulnerable ·nothings

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-6620
  2. 2026-10-03 Alias added: GHSA-r4r4-cp78-rh67

References

Exploit 1

  • TI-2022-09146 stb_truetype.h v1.26 was discovered to contain a heap-buffer-overflow via the function… CVSS 3.1HIGH 7.5
  • TI-2026-04647 Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-bounds CVSS 4.0MEDIUM 5.3
  • TI-2026-04646 Nothings stb TTF File stb_truetype.h stbtt_InitFont_internal out-of-bounds CVSS 4.0MEDIUM 5.3
  • TI-2020-05450 stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index. CVSS 3.1HIGH 8.8
  • TI-2020-05449 stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_peek8. CVSS 3.1HIGH 8.8
  • TI-2020-05448 stb stb_truetype.h through 1.22 has a heap-based buffer over-read in ttUSHORT. CVSS 3.1HIGH 8.8
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences