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CVE-2026-82864— pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb

Quick assessment

Affected
pdfme pdf-lib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 bom

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-82864

Vulnerability Information

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Vulnerability Title
pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pdfme pdf-lib 0 ~ 5.5.10 -

II. Public POCs for CVE-2026-82864

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III. Intelligence Information for CVE-2026-82864

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Other References for CVE-2026-82864 (2)

Same Patch Batch · pdfme · 2026-08-31 · 5 CVEs total

CVE-2026-82866 6.8 MEDIUM @pdfme/common before 5.5.10 SSRF via Unvalidated URL Fetch
CVE-2026-82867 6.1 MEDIUM @pdfme/schemas before 5.5.9 Cross-Site Scripting via Select
CVE-2026-82868 6.1 MEDIUM @pdfme/schemas before 5.5.9 Cross-Site Scripting via SVG
CVE-2026-82865 4.4 MEDIUM pdfme schemas before 5.5.10 Cross-Site Scripting via i18n Label

IV. Related Vulnerabilities

Same vendor: pdfme
Same weakness: CWE-409

V. Comments for CVE-2026-82864

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