CVE-2026-28231 - pillow_heif Has Integer Overflow in Encode Path Buffer Validation that Leads to Heap Out-of-Bounds Read

CVE-2026-28231 - pillow_heif Has Integer Overflow in Encode Path Buffer Validation that Leads to Heap Out-of-Bounds Read

https://cvefeed.io/rssfeed/latest.atom / Fri, 02/27/2026 - 23:04
CVE ID : CVE-2026-28231
Published : Feb. 27, 2026, 8:21 p.m. | 1 hour, 14 minutes ago
Description : pillow_heif is a Python library for working with HEIF images and plugin for Pillow. Prior to version 1.3.0, an integer overflow in the encode path buffer validation of `_pillow_heif.c` allows an attacker to bypass bounds checks by providing large image dimensions, resulting in a heap out-of-bounds read. This can lead to information disclosure (server heap memory leaking into encoded images) or denial of service (process crash). No special configuration is required — this triggers under default settings. Version 1.3.0 fixes the issue.
Severity: 5.5 | MEDIUM
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