Preliminary research

Three Bugs Walk Into a PDF: Prototype Pollution, Served Cold

Shreyas Penkar · STAR Labs

AI-collected research leads through 6 October 2026, including bounded month-by-month reviews of selected social and community sources from January through September. Unranked, incomplete, not community-vetted, and subject to change.

Patch comparisons explain how inherited properties and unvalidated object types crossed privileged scripting boundaries in Acrobat Reader. The analysis clarifies a previously disclosed chain and its repairs, with elevated JavaScript and file-access demonstrations.

Record

Researcher

Shreyas Penkar

Published by

STAR Labs

In the archive

• Collected in the 2026 preliminary research sweep

Related sources

• Original disclosure
• Earlier analysis

Tags

• prototype-pollution
• javascript
• pdf
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Shreyas Penkar, first published at the original source. Preserved copies are kept so the citation survives its host.