CVE WatchOct 7, 2026

CVE-2021-29425

In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "//../foo", or "\\..\f

CVSS

4.8

Medium

EPSS

10.5%

p96

KEV

—

Exploit Today

0-100

Published: Apr 13, 2021 · Last modified: Oct 7, 2026 · CWE-20 · CWE-22

EPSS · 30d

9.9%EPSS · 30 days10.5%

2026-09-282026-10-26

Technical description

In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "//../foo", or "\\..\foo", the result would be the same value, thus possibly providing access to files in the parent directory, but not further above (thus "limited" path traversal), if the calling code would use the result to construct a path value.

Official references

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