Bug 2556322 (CVE-2026-112406) - CVE-2026-112406 pillow: pillow: Denial of Service via infinite loop during PDF page rewriting
Summary: CVE-2026-112406 pillow: pillow: Denial of Service via infinite loop during PD...
Keywords:
Status: NEW
Alias: CVE-2026-112406
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 16:22 UTC by OSIDB Bzimport
Modified: 2026-10-20 21:08 UTC (History)
59 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-20 16:22:39 UTC 
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow can enter an infinite loop while rewriting PDF pages. PdfParser.rewrite_pages() follows Parent relationships without detecting a cycle in the page tree. An attacker can supply a cyclic PDF to an application that appends an image to that PDF. This can hold the worker at full CPU and deny service. This issue is fixed in version 13.0.0.
Note You need to log in before you can comment on or make changes to this bug.