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TI-2026-57168 Aliases CVE-2026-82864GHSA-gvgq-37w5-4f8q

pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb

Priority LOW 32CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00436 38th percentileScored 2026-11-07
Fix Fixed pdf-lib (pdfme): 5.5.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pdfmepdf-libbefore 5.5.105.5.10Patch availableCNA
  • pdf-lib Vendorpdfme Affected before 5.5.10 Fixed in 5.5.10 Patch available CNA

Remediation

  • Fix · CNA pdf-lib (pdfme) Fixed in 5.5.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82864
  2. 2026-10-03 Alias added: GHSA-gvgq-37w5-4f8q

References

Advisory 1

  • TI-2026-79748 Server-side request forgery in @pdfme/common denylist bypass CVSS 4.0HIGH 8.9
  • TI-2026-57170 @pdfme/common before 5.5.10 SSRF via Unvalidated URL Fetch CVSS 4.0HIGH 8.9
  • TI-2025-33553 pdfme has Sandbox Escape and Prototype Pollution vulnerabilities in pdfme expression evaluation CVSS 3.1MEDIUM 6.1
  • TI-2026-57172 @pdfme/schemas before 5.5.9 Cross-Site Scripting via SVG CVSS 4.0MEDIUM 5.3
  • TI-2026-57171 @pdfme/schemas before 5.5.9 Cross-Site Scripting via Select CVSS 4.0MEDIUM 5.3
  • TI-2026-57169 pdfme schemas before 5.5.10 Cross-Site Scripting via i18n Label CVSS 4.0LOW 2.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences