CVE-2026-59203
Pillow: Pillow: Denial of Service via crafted EPS file
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 15, 2026
Updated · November 1, 2026
Description
A flaw was found in Pillow, a Python imaging library. A remote attacker could exploit this vulnerability by providing a specially crafted Encapsulated PostScript (EPS) file. The EPS parser incorrectly handles negative byte counts, causing the system to enter an infinite loop when processing the file. This can lead to a Denial of Service (DoS), making the affected system unresponsive.
Statement
The impact is limited to denial of service via an infinite parsing loop. Exploitation requires the application to open a crafted EPS file, but does not lead to memory corruption or code execution.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-835 · Loop with Unreachable Exit Condition