Pillow: PdfParser can recurse without limit in get_value() and linearize_page_tree()

影響: pip:Pillow >= 5.1.0, < 13.0.0 → 13.0.0

PdfParser's get_value() can recurse without any limit and crash with an uncaught RecursionError. It is reachable through Image.save(im, fp= , format="PDF", append=True) when the existing PDF file is attacker-controlled. This is the same class of bug as https://github.com/advisories/GHSA-r73j-pqj5-w3x7 (the /Prev trailer chain loop, fixed earlier this year), in the same file, but in two different functions that fix did not touch. Details get_value() in src/PIL/PdfParser.py This is a clas…

Read on GitHub Advisory Database

On 10/22/2026, 06:11 AM, GitHub Advisory Database published "Pillow: PdfParser can recurse without limit in get_value() and linearize_page_tree()" (type: Advisory). Severity is "Medium" (medium). Related technologies: Python, GitHub. CVE: CVE-2026-112391.