CVE-2026-13723

01/תיאור (מקור, אנגלית)

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.

02/קישורים4

• kb.cert.org/vuls/id/293714
• github.com/develar/app-builder
• github.com/develar/app-builder/pull/163
• www.kb.cert.org/vuls/id/293714