CVE-2026-27888

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/7a4c8246ed48d9d328fb596942271da47b6d109c	Patch
https://github.com/py-pdf/pypdf/pull/3658	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.3	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:py-pdf:pypdf:*:*:*:*:*:*:*:*

History

02 Nov 2026, 16:06

Type	Values Removed	Values Added
CPE	cpe:2.3:a:pypdf_project:pypdf::::::::	cpe:2.3:a:py-pdf:pypdf::::::::
First Time		Py-pdf pypdf Py-pdf

Information

Published : 2026-02-26 01:16

Updated : 2026-11-02 16:06

NVD link : CVE-2026-27888

Mitre link : CVE-2026-27888

CVE.ORG link : CVE-2026-27888

JSON object : View

Products Affected

py-pdf

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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