Is pillow affected by CVE-2026-42311?

PyPI pillow is affected in >=10.3.0 <12.2.0.

Is CVE-2026-42311 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.1%.

high

CVE-2026-42311

Q: Is CVE-2026-42311 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.1%.

PyPI · pillow

Summary

Pillow has an OOB Write with Invalid PSD Tile Extents (Integer Overflow)

Severity: high
EPSS: 0.1% (p5)
Also known as: GHSA-pwv6-vv43-88gr, BIT-pillow-2026-42311
Published: 2026-05-04

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-cfh3-3jmp-rvhc
https://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr
https://nvd.nist.gov/vuln/detail/CVE-2026-42311

Related advisories

CVE-2026-40192 — high · PyPI/pillow
CVE-2026-25990 — high · PyPI/pillow
CVE-2026-42308 — medium · PyPI/pillow
CVE-2026-42310 — medium · PyPI/pillow
CVE-2026-42309 — medium · PyPI/pillow
CVE-2025-48379 — medium · PyPI/pillow

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.