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CVE-2026-28231

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
bigcat88 / pillow_heifaffected < 1.3.0

CWE

CWE-125, CWE-190

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.