Name: CVE-2026-42308: Integer Overflow or Wraparound
Creator: Rapid7
Published: 2026-05-09T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-42308, CWE-190, CVSS 5.5, EPSS 0.00159

Pillow is a Python imaging library. Prior to version 12.2.0, if a font advances for each glyph by an exceeding large amount, when Pillow keeps track of the current position, it may lead to an integer overflow. This issue has been patched in version 12.2.0.

CVSS Details

CVSS 4.0 Base Score: 5.1 (MEDIUM)
CVSS 4.0 Vector: (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Amazon Linux Ami 2	—	Upgrade python-pillow-tkUpgrade python-pillow-saneUpgrade python-pillow-develUpgrade python-pillow-debuginfoUpgrade python-pillowUpgrade python-pillow-doc	Jun 8, 2026	Jun 8, 2026
Amazon_linux_2023	—	Upgrade python3-pillow-develUpgrade python-pillow-debugsourceUpgrade python3-pillowUpgrade python-pillow-debuginfoUpgrade python3-pillow-debuginfoUpgrade python3-pillow-tk-debuginfoUpgrade python3-pillow-tk	May 28, 2026	May 9, 2026
Debian	—	Upgrade pillow	Jul 23, 2026	Jul 23, 2026
Redhat_linux	—	No solution exists	Jul 17, 2026	May 9, 2026
Ubuntu	—	Upgrade python3-pil	Jun 8, 2026	May 9, 2026

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