CVE-2021-28677

Name: CVE-2021-28677
Creator: NVD / NIST
Published: 2021-06-02T16:15:08.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.29%

Last modified Jun 17, 2026

CVE-2021-28677 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. EPSS estimates a 2.29% chance of exploitation in the next 30 days.

Description

An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.29%

81.0th percentile

Probability of exploitation in the next 30 days. Learn more

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.debian.org/debian-lts-announce/2021/07/msg00018.htmlThird 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-2021-28677-fix-eps-dos-on-openThird Party Advisory
https://security.gentoo.org/glsa/202107-33Third Party Advisory
https://github.com/python-pillow/Pillow/pull/5377Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlThird 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-2021-28677-fix-eps-dos-on-openThird Party 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-2021-28677?

How severe is CVE-2021-28677?

CVE-2021-28677 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28677?

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-2021-28677?

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

Scan your code now

Source: NVD / NIST