CVE-2026-34085

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CVSS 3.1

7.8 high

EPSS

<1%p2

Published

Mar 25, 2026 (Mar 25, 2026)

Modified

Jun 17, 2026

Description

fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.

Vendors: fontconfig project
Products: fontconfig
Weakness: CWE-193
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.1%)

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