CVE-2020-10177

Name: CVE-2020-10177
Creator: NVD / NIST
Published: 2020-06-25T19:15:12.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.47%

Last modified Jun 17, 2026

CVE-2020-10177 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Pillow before 7.1.0 has multiple out-of-bounds reads in libImaging/FliDecode.c.. EPSS estimates a 1.47% chance of exploitation in the next 30 days.

Description

Pillow before 7.1.0 has multiple out-of-bounds reads in libImaging/FliDecode.c.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.47%

70.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Python	Pillow	< 7.1.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04

References

https://github.com/python-pillow/Pillow/commits/master/src/libImagingBroken Link
https://github.com/python-pillow/Pillow/pull/4503Issue Tracking, Patch
https://github.com/python-pillow/Pillow/pull/4538Issue Tracking, Patch
https://lists.debian.org/debian-lts-announce/2020/08/msg00012.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEBCPE4F2VHTIT6EZA2YZQZLPVDEBJGD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HOKHNWV2VS5GESY7IBD237E7C6T3I427/
https://pillow.readthedocs.io/en/stable/releasenotes/7.1.0.htmlProduct
https://usn.ubuntu.com/4430-1/Third Party Advisory
https://usn.ubuntu.com/4430-2/Third Party Advisory
https://github.com/python-pillow/Pillow/commits/master/src/libImagingBroken Link
https://github.com/python-pillow/Pillow/pull/4503Issue Tracking, Patch
https://github.com/python-pillow/Pillow/pull/4538Issue Tracking, Patch
https://lists.debian.org/debian-lts-announce/2020/08/msg00012.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEBCPE4F2VHTIT6EZA2YZQZLPVDEBJGD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HOKHNWV2VS5GESY7IBD237E7C6T3I427/
https://pillow.readthedocs.io/en/stable/releasenotes/7.1.0.htmlProduct
https://usn.ubuntu.com/4430-1/Third Party Advisory
https://usn.ubuntu.com/4430-2/Third Party Advisory

Timeline

Published: Jun 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10177?

Pillow before 7.1.0 has multiple out-of-bounds reads in libImaging/FliDecode.c.

How severe is CVE-2020-10177?

CVE-2020-10177 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.47% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10177?

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-2020-10177?

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

Scan your code now

Source: NVD / NIST