High severity7.0NVD Advisory· Published Oct 20, 2026· Updated Oct 20, 2026
CVE-2026-113679
CVE-2026-113679
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: 8.0.0-14.6.0
Patches
Vulnerability mechanics
References
5- github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hhnvd
- github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-list.hhnvd
- github.com/harfbuzz/harfbuzz/commit/5e821de8256d01780566b5c8ab7886fae4c93da8nvd
- github.com/harfbuzz/harfbuzz/pull/6414nvd
- www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-out-of-bounds-write-via-webassembly-font-glyph-to-stringnvd
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