CVE-2026-27888

7.5 HIGH
Published: February 26, 2026 Modified: February 27, 2026
View on NVD

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/py-pdf/pypdf/pull/3658
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.3
Source: security-advisories@github.com
Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj
Source: security-advisories@github.com
Patch Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
15th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

pypdf_project