Fix path traversal in manifest export packaging - #1015
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Darren Miller (millerds)
approved these changes
Sep 9, 2026
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Summary
Fixes a path traversal / information disclosure vulnerability in
office-addin-manifest's export packaging. TheaddZipFilefunction inexport.tsjoined attacker-controllable manifest file fields to the manifestdirectory without validating for
..traversal or absolute paths (onlyhttps://URLs were rejected).Fix
addZipFilenow resolves the target path and verifies it stays within themanifest directory before reading:
..escape).