CVE-2026-112406CWE-835

CVE-2026-112406

published October 20, 2026

CVSS
8.7
EPSS
0%
Percentile
20.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00291 · 20.6th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-10-20T02:17Z
References (3)
https://github.com/python-pillow/Pillow/commit/b3ebf20c694f2f12537a629c30229a1d5a53f777 · [email protected]https://github.com/python-pillow/Pillow/releases/tag/13.0.0 · [email protected]https://github.com/python-pillow/Pillow/security/advisories/GHSA-f2g6-542v-9j58 · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 21:31Z
    Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle
    cvelistv5
  • 19 OCT 21:31Z
    Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle
    cvelistv5