CVE-2021-28678

Name: CVE-2021-28678
Creator: NVD / NIST
Published: 2021-06-02T16:15:08.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-28678 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.73%

49.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-345

Affected Software

Vendor	Product	Versions
Python	Pillow	< 8.2.0
Fedoraproject	Fedora	33

References

https://github.com/python-pillow/Pillow/pull/5377Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dosRelease Notes, Vendor Advisory
https://security.gentoo.org/glsa/202107-33Third Party Advisory
https://github.com/python-pillow/Pillow/pull/5377Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dosRelease Notes, Vendor Advisory
https://security.gentoo.org/glsa/202107-33Third Party Advisory

Timeline

Published: Jun 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28678?

How severe is CVE-2021-28678?

CVE-2021-28678 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28678?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28678?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST