Insufficient Verification of Data Authenticity in Pillow

MEDIUM 5.5CVE-2021-28678 · BIT-pillow-2021-28678 · GHSA-hjfx-8p6c-g7gx · Published 02/06/2021 · updated 17/06/2026

Package	Affected versions	Patched versions
pillow PyPI	`≥ 5.1.0, < 8.2.0< 8.2.0`	`8.2.0`
pillow python	`< 8.2.0`	`8.2.0`

Description

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.

NVD description

References

nvd.nist.gov/vuln/detail/CVE-2021-28678 · ADVISORY
python-pillow/Pillow#5377 · WEB
python-pillow/Pillow#5377 · WEB
GitHub Advisory GHSA-hjfx-8p6c-g7gx · ADVISORY
pypa/advisory-database · WEB
python-pillow/Pillow · PACKAGE
lists.fedoraproject.org/archives/list/[email protected]/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL · WEB
pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html · WEB
security.gentoo.org/glsa/202107-33 · WEB
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
lists.fedoraproject.org/archives/list/[email protected]/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL · WEB

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