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Vulnerability record · CVE-2023-44271 · published 3 November 2023

CVE-2023-44271: Python pillow allocation without limits vulnerability

Python · Pillow

An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of memory. This occurs for truetype in ImageFont when textlength in an ImageDraw instance operates on a long text argument.

7.5 CVSS 3.1 High EPSS 1.1% · top 34.9% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of memory. This occurs for truetype in ImageFont when textlength in an ImageDraw instance operates on a long text argument.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://devhub.checkmarx.com/cve-details/CVE-2023-44271/ Third Party Advisory
https://github.com/python-pillow/Pillow/commit/1fe1bb49c452b0318cad12ea9d97c3bef188e9a7 Patch
https://github.com/python-pillow/Pillow/pull/7244 Patch
https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N2JOEDUJDQLCUII2LQYZYSM Mailing ListThird Party Advisory
https://devhub.checkmarx.com/cve-details/CVE-2023-44271/ Third Party Advisory
https://github.com/python-pillow/Pillow/commit/1fe1bb49c452b0318cad12ea9d97c3bef188e9a7 Patch
https://github.com/python-pillow/Pillow/pull/7244 Patch
https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N2JOEDUJDQLCUII2LQYZYSM Mailing ListThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-44271), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.