CVE-2026-59935CWE-835

pypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)

High · published July 8, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
49.1
In the wild
Unconfirmed
What it is

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a page content stream containing a not terminated inline image that uses the ASCII85 or ASCIIHex filters, causing an infinite loop during parsing such as when extracting page text. This issue is fixed in version 6.14.2.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00620 · 49.1th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-07-08T19:34Z
EPSS history
Timeline
  • 08 JUL 19:34Z
    pypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)
    cvelistv5