CVE-2026-42308

Pillow: Integer overflow when processing fonts

MEDIUM
5.5
CVSS Score
Published: May 9, 2026 at 04:09 AM UTC
Updated: July 24, 2026 at 09:20 PM UTC
2 products affected across 2 vendorsPillowPillow

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 12.2.0
Affected range stops below 12.2.0, so it looks safe — our inference, not a vendor statement
v < 12.2.0
Affected range stops below 12.2.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/python-pillow/Pillow/releases/tag/12.2.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-190

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