CVE-2026-112895 Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for CVE-2026-42310)

Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow can exhaust resources while parsing an existing PDF during an append operation. PdfParser follows page-tree child references without cycle or duplication tracking and follows previous-trailer chains with only an exact...

CVE-2026-112895 Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for CVE-2026-42310)

Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow can exhaust resources while parsing an existing PDF during an append operation. PdfParser follows page-tree child references without cycle or duplication tracking and follows previous-trailer chains with only an exact...

CVE-2026-112895

The Pillow Python imaging library (versions 5.1.0 through 13.0.0 ) is vulnerable to resource exhaustion during PDF append operations. The root cause lies in the PdfParser component, which lacks cycle or duplication tracking when following page-tree child references and follows previous-trailer ch...