Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-113679— HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string

Quick assessment

Affected
harfbuzz harfbuzz
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HarfBuzz 8.0.0 至 14.6.0 版本在实验性的 WebAssembly 字形处理器（shaper）中存在越界写入漏洞，原因是 导入函数的 WAMR 签名错误。攻击者可构造恶意字体文件，使其 WebAssembly 模块将输出缓冲区置于线性内存的末尾，从而将字形名称字节写入主机内存，导致应用程序崩溃或数据损坏。

CVSS 7.0 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-113679

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
harfbuzz harfbuzz 8.0.0 ~ 14.6.0 -

II. Public POCs for CVE-2026-113679

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-113679

请登录查看更多情报信息。

Other References for CVE-2026-113679 (5)

IV. Related Vulnerabilities

Same product: harfbuzz
Same vendor: harfbuzz
Same weakness: CWE-787

V. Comments for CVE-2026-113679

No comments yet

Leave a comment