CVE-2021-23437

high

Description

The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.

References

Advisories
More

https://security.gentoo.org/glsa/202211-10

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/

https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b

https://github.com/advisories/GHSA-98vv-pw6r-q6q4

https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443

https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html

https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-0170

Details

Source: Mitre, NVD

Published: 2021-09-03

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

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

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.0318