PT-2026-59511 · Pypi · Pillow

Publicado 2026-07-13 · Atualizado 2026-07-13

OSV

CVSS v3.1

5.5

Média

Vetor base

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact

An attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive.

Patches

Patched version: 12.2.0.

PdfParser (introduced in Pillow 4.2.0) follows Prev pointers in PDF trailers to read cross-reference sections. If a trailer's Prev pointer references an offset that has already been processed — either pointing to itself or forming a longer cycle — the parser enters an infinite loop. Pillow now tracks previously processed trailer offsets and raises an error if a cycle is detected.

Workarounds

Use any version but the affected versions: >= 4.2.0, < 12.2.0

Resources

• Fix: https://github.com/python-pillow/Pillow/pull/9519

Correção

Identificadores relacionados

PYSEC-2026-2874

Produtos afetados

Pillow

Referências · 9

• https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468 · Nota
• https://github.com/python-pillow/Pillow/pull/9519 · Nota
• https://github.com/python-pillow/Pillow/releases/tag/12.2.0 · Nota
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7 · Nota
• https://github.com/python-pillow/Pillow · Nota
• https://pypi.org/project/pillow · Nota
• https://osv.dev/vulnerability/PYSEC-2026-2874 · Aviso do Fabricante
• https://github.com/advisories/GHSA-r73j-pqj5-w3x7 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-42310 · Nota de Segurança