Read the docs
TI-2026-04647 Aliases CVE-2026-5315GHSA-gcmq-v5j6-6rjx

Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-bounds

Priority MEDIUM 57CWE-119Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was determined in Nothings stb up to 1.26. The affected element is the function stbtt__buf_get8 in the library stb_truetype.h of the component TTF File Handler. Executing a manipulation can lead to out-of-bounds read. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00515 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nothingsstb1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13; 1.14; 1.15; 1.16; 1.17; 1.18; 1.19; 1.20; 1.21; 1.22; 1.23; 1.24; 1.25; 1.26—No fix listedCNA
  • stb Vendornothings Affected 1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13; 1.14; 1.15; 1.16; 1.17; 1.18; 1.19; 1.20; 1.21; 1.22; 1.23; 1.24; 1.25; 1.26 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*up to 1.26Vulnerablenothings
  • cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:* Versions up to 1.26 Vulnerable ·nothings

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5315
  2. 2026-10-03 Alias added: GHSA-gcmq-v5j6-6rjx
  3. 2026-10-25 EPSS moved to the below the 50th percentile

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-2026-04646 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
  • TI-2020-05447 stb stb_truetype.h through 1.22 has a heap-based buffer over-read in stbtt__buf_get8. 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