PT-2021-4567
CVE-2021-28676
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Published
2021-03-18
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Updated
2026-03-31
Description by
CVSS 3.1
9.1
CriticalMetricsAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Name of the Vulnerable Software and Affected Versions
Pillow versions prior to 8.2.0
Description
An issue was discovered in the FliDecode component of the Pillow image processing library, related to incorrect checking of non-zero block advance for FLI data. This could potentially lead to an infinite loop when loading data. The issue may allow a remote attacker to cause a denial of service.
Recommendations
For versions prior to 8.2.0, update to version 8.2.0 or later to resolve the issue. As a temporary workaround, consider avoiding the use of FLI data with the FliDecode component until a patch is applied.
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