CVE-2026-49461CWE-400

pypdf: Possible large memory usage for form XObjects during text extraction

Medium · published June 22, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
6.5
In the wild
Unconfirmed
What it is

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. This vulnerability is fixed in 6.12.2.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00174 · 6.5th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-06-22T20:27Z
EPSS history
Timeline
  • 22 JUN 20:27Z
    pypdf: Possible large memory usage for form XObjects during text extraction
    cvelistv5