CVE-2026-113679 (GCVE-0-2026-113679)
Vulnerability from cvelistv5 – Published: 2026-10-20 15:40 – Updated: 2026-10-20 16:21
VLAI
EPSS
VEX
Title
HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string
Summary
HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 16:21 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/harfbuzz/harfbuzz/pull/6414 | patchissue-tracking |
| https://github.com/harfbuzz/harfbuzz/commit/5e821… | patch |
| https://github.com/harfbuzz/harfbuzz/blob/14.6.0/… | technical-description |
| https://github.com/harfbuzz/harfbuzz/blob/14.6.0/… | technical-description |
| https://www.vulncheck.com/advisories/harfbuzz-8.0… | third-party-advisory |
Impacted products
Date Public
2026-10-19 21:41
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