SB2026041113 - Multiple vulnerabilities in Pillow

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026041113

SB2026041113 - Multiple vulnerabilities in Pillow

Published: April 11, 2026 Updated: April 23, 2026

Security Bulletin ID SB2026041113
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2026-40192)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the FITS image decoder when parsing a specially crafted GZIP-compressed FITS file. A remote attacker can supply a specially crafted FITS file to cause a denial of service.

The issue can result in unbounded memory consumption, leading to an out-of-memory crash or severe performance degradation.


2) Heap-based buffer overflow (CVE-ID: N/A)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 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/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a heap-based buffer overflow in coordinate-processing APIs such as ImagePath.Path, ImageDraw.ImageDraw.polygon, and ImageDraw.ImageDraw.line when processing nested list coordinates. A remote attacker can pass nested lists as coordinates to cause a denial of service.

The issue was introduced in Pillow 11.2.1.


3) Integer overflow (CVE-ID: N/A)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer overflow in font processing when handling fonts with excessively large glyph advance values. A remote attacker can supply a specially crafted font to cause a denial of service.


4) Infinite loop (CVE-ID: N/A)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in PdfParser when parsing a malicious PDF trailer with cyclic Prev pointers. A remote attacker can supply a specially crafted PDF file to cause a denial of service.

The issue can cause the process to hang indefinitely, consume 100% CPU, and make the application unresponsive.


Remediation

Install update from vendor's website.

References