CVE-2026-112391: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in python-pillow Pillow
Description
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow's PdfParser.get_value() can recurse without a limit while reading nested PDF objects. The parser follows attacker-controlled arrays and dictionaries when an existing PDF is opened for append. An attacker can provide a deeply nested PDF to an application that saves an image with PDF append enabled. This can raise an uncaught RecursionError or terminate the worker, causing denial of service. This issue is fixed in version 13.0.0.
CVSS v4.0
Score 6.3medium
Affected software
python-pillow
Pillow
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-19T16:58:51.958Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad682502cdf04f6568c0eb9
Added to database: 10/19/2026, 20:49:20 UTC
Last updated: 10/19/2026, 20:49:20 UTC
Views: 1
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