CVE Catalog

CVE-2026-13723

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.48%

41th percentile - higher than 41% of all known CVEs

Summary

The zipx.Unzip function in Develar's app-builder is vulnerable to arbitrary file overwrite on macOS APFS by exploiting a Unicode normalization collision combined with symlink following. APFS treats certain Unicode-equivalent filenames as identical, and app-builder does not normalize paths before validation.

Risk Assessment

The risk is overwriting critical system or application files via a crafted ZIP archive, potentially leading to system integrity compromise or arbitrary code execution.

Recommendation

Upgrade Develar's app-builder to a patched version and avoid extracting ZIP archives from untrusted sources.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS