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pypdf CVE-2026-48155

| EUVD-2026-32914 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2026-05-28 GitHub_M
Denial Of Service Python
4.8
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

5
Source Code Evidence Fetched
May 28, 2026 - 17:51 vuln.today
Analysis Generated
May 28, 2026 - 17:51 vuln.today
Patch available
May 28, 2026 - 17:01 EUVD
CVSS changed
May 28, 2026 - 16:22 NVD
4.8 (MEDIUM)
CVE Published
May 28, 2026 - 14:51 nvd
UNKNOWN (no severity yet)

DescriptionNVD

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.

AnalysisAI

Memory exhaustion in pypdf prior to 6.12.0 allows an attacker who supplies a crafted PDF to cause large memory consumption in any application that processes it using layout mode text extraction. The vulnerability is triggered by PDFs containing text positioning operators with abnormally large x- or y-coordinate offsets, causing the library to allocate unbounded whitespace and newline characters during rendering. …

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CVE-2026-48155 vulnerability details – vuln.today
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