CVE-2026-82864: Pdfme PDF-Lib

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

pdfme pdf-lib versions before 5.5.10 contain an unbounded buffer growth vulnerability in the DecodeStream.ensureBuffer() method that allows attackers to cause denial of service by supplying a crafted PDF with a FlateDecode stream containing a decompression bomb. Attackers can upload a small compressed PDF that decompresses to hundreds of megabytes, exhausting memory and crashing the Node.js process or freezing browser tabs during PDF parsing.

Affected products

• Pdfme PDF-Lib: before 5.5.10 (fixed in 5.5.10)

Published 2026-08-31. Last modified 2026-10-08.