Vulnerability in Pdfme Pdf-Lib
CVE-2026-82864
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 · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/pdfme/pdfme/security/advisories/GHSA-vrqm-gvq7-rrwh (vendor-advisory)
- www.vulncheck.com/advisories/pdfme-pdf-lib-before-5.5.10-denial-of-service-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82864?
- CVE-2026-82864 is a medium-severity vulnerability in Pdfme Pdf-Lib, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-08-31.
- How severe is CVE-2026-82864?
- Medium severity. CVSS v3 base score is 6.5 out of 10.