CVE-2026-82864

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product@pdfme/pdf-lib

PublishedAug 31, 2026

First seenAug 31, 2026

Weakness typeCWE-409CWE-409

How to fix

Update

@pdfme/pdf-lib5.5.10 or later

Vendor advisories

github.com/pdfme/pdfme/security/advisories/GHSA-vrqm-gvq7-rrwh

Affected products

Product	Affected versions	Fixed in
@pdfme/pdf-libnpm	v < 5.5.10	5.5.10

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