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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 30 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Develar
Develar app-builder
Vendors & Products Develar
Develar app-builder

Wed, 29 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22
CWE-59
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-07-29T18:21:44.159Z

Reserved: 2026-06-29T14:24:39.792Z

Link: CVE-2026-13723

cve-icon Vulnrichment

Updated: 2026-07-29T18:20:56.270Z

cve-icon NVD

Status : Deferred

Published: 2026-07-29T18:16:50.603

Modified: 2026-07-30T19:10:06.847

Link: CVE-2026-13723

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T13:15:05Z

Weaknesses