Medium severity · published Aug 31, 2026
CVE-2026-82864
pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PD
pdf-lib · pdfme
before 5.5.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82864
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82864
vendor-advisory
https://github.com/pdfme/pdfme/security/advisories/GHSA-vrqm-gvq7-rrwh
third-party-advisory
https://www.vulncheck.com/advisories/pdfme-pdf-lib-before-5.5.10-denial-of-service-via-decompression-bomb