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.
Metrics
Affected Vendors & Products
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References
History
Wed, 29 Jul 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-22 CWE-59 |
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| Metrics |
cvssV3_1
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Wed, 29 Jul 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Develar's electron-builder allows arbitrary file overwrite | |
| References |
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MITRE
Status: PUBLISHED
Assigner: certcc
Published:
Updated: 2026-07-29T18:21:44.159Z
Reserved: 2026-06-29T14:24:39.792Z
Link: CVE-2026-13723
Vulnrichment
Updated: 2026-07-29T18:20:56.270Z
NVD
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Redhat
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OpenCVE Enrichment
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