CVE Watch29 jul 2026

CVE-2026-13723

A vulnerability in the `zipx.Unzip` extraction routine of Develar's app-builder allows an attacker to overwrite arbitrary files on macOS APF

CVSS

6.5

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 29 jul 2026 · Última mod.: 29 jul 2026 · CWE-22 · CWE-59

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

A vulnerability in the `zipx.Unzip` extraction routine of Develar's app-builder allows an attacker to overwrite arbitrary files on macOS APFS by exploiting a Unicode Normalization Collision combined with symlink following behavior. APFS treats certain Unicode equivalent filenames as identical (e.g., ß ↔ ss), while app builder performs no canonical normalization before validating or writing paths. As a result, a crafted ZIP archive containing: • a symlink entry named ss pointing to a target file, and • a regular file named ß containing attacker controlled data, will cause the second write to follow the symlink and overwrite the target file.

Referencias oficiales

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