CVE-2026-114501

Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.

• CWE-226
• CWE-908

• https://github.com/python-pillow/Pillow/commit/19f64946eb247b973dd4560be7dea3bf979d2e6aPatch
• https://github.com/python-pillow/Pillow/pull/10172Issue Tracking
• https://github.com/python-pillow/Pillow/releases/tag/13.0.0Release Notes
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-654x-cwwv-5j9cVendor Advisory
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-654x-cwwv-5j9cVendor Advisory

Published

Oct 21, 2026

Last Modified

Oct 30, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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