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.
Published: 2026-08-31
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 31 Aug 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb
First Time appeared Pdflib
Pdflib pdflib
Weaknesses CWE-409
CPEs cpe:2.3:a:pdflib:pdflib:*:*:*:*:*:*:*:*
Vendors & Products Pdflib
Pdflib pdflib
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Pdflib Pdflib
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-31T08:46:35.269Z

Reserved: 2026-08-31T08:37:53.169Z

Link: CVE-2026-82864

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-31T09:17:06.957

Modified: 2026-08-31T09:17:06.957

Link: CVE-2026-82864

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T10:30:17Z

Weaknesses
  • CWE-409

    Improper Handling of Highly Compressed Data (Data Amplification)