What is CVE-2020-35655?

CVE-2020-35655 is a medium-severity vulnerability in Python Pillow, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2021-01-12.

How severe is CVE-2020-35655?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Out-of-bounds Read in Python Pillow

CVE-2020-35655

In Pillow before 8.1.0, SGIRleDecode has a 4-byte buffer over-read when decoding crafted SGI RLE image files because offsets and length tables are mishandled.

Vulnerability class: Buffer Overflow

Published 2021-01-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.016 (75.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.001

Affected products

Python Pillow
Fedoraproject Fedora — versions 32, 33

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

pillow.readthedocs.io/en/stable/releasenotes/index.html (Third Party Advisory, Release Notes)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2020-35655?: CVE-2020-35655 is a medium-severity vulnerability in Python Pillow, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2021-01-12.
How severe is CVE-2020-35655?: Medium severity. CVSS v3 base score is 5.4 out of 10.