CVE-2021-28678: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.

Affected products

• Fedoraproject Fedora: version 33 only
• Python Pillow: before 8.2.0 (fixed in 8.2.0)

Published 2021-06-02. Last modified 2026-06-17.