CVE-2026-113679 HarfBuzz - Out of Bounds Write

HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability caused by incorrect WAMR signature in font_glyph_to_string import in the experimental WebAssembly shaper, letting attackers crash or corrupt applications by supplying crafted fonts.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Out of Bounds Write
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-787

Vendor fix

Update to a version later than 14.6.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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