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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Tue, 20 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string
First Time appeared Harfbuzz Project
Harfbuzz Project harfbuzz
Weaknesses CWE-787
CPEs cpe:2.3:a:harfbuzz_project:harfbuzz:*:*:*:*:*:*:*:*
Vendors & Products Harfbuzz Project
Harfbuzz Project harfbuzz
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T16:21:50.578Z

Reserved: 2026-10-20T14:50:55.487Z

Link: CVE-2026-113679

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T16:17:12.770

Modified: 2026-10-20T16:17:12.770

Link: CVE-2026-113679

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses