🛡️ CVE-2026-42308 — pillow

🟡 CVSS 5.0 — Medium ✅ No Known Exploit CWE-190 NVD

5.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

Pillow: Integer overflow when processing fonts

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2026-42308 is classified as CWE-190: Integer Overflow or Wraparound. Arithmetic produces a value too large for its type and wraps around, so a later size or bounds check passes when it should not.

Affected software

CVE-2026-42308 is recorded against 2 packages.

pillow
unknown

Timeline and source

Published on 12 May 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
github.com (Web)
nvd.nist.gov (Web)

CVE-2026-42308 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian PyPI (Root.io)Ubuntu

Details

Severity MEDIUM

CVSS Score 5.0

CVSS 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

CWE CWE-190

Public Exploit ✅ No

Source NVD

Published 2026-05-12

Updated 2026-08-12

Modified 2026-07-24

Fix URL N/A

Affected Packages

Software	From version	Fixed in
pillow	—	—
unknown	—	—

References

WEB https://github.com/python-pillow/Pillow/releases/tag/12.2.0

WEB https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98j

WEB https://nvd.nist.gov/vuln/detail/CVE-2026-42308

🔗 NVD 🔗 Mitre

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