CVE-2021-45105

MediumCVSS 5.9/10Last modified Aug 25, 2026

Description

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20 CWE-674

Affected software

No affected versions have been published.

Timeline

Published: Dec 18, 2021
Last modified: Aug 25, 2026
NVD status: Modified

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