Denial of service via out of memory (OOM) owing to no sanity limit on normal form fields in multipart forms. When a Multipart request has non-file normal form fields, Struts used to bring them into memory as Strings without checking their sizes. This could lead to an OOM if developer has set struts.multipart.maxSize to a value equal or greater than the available memory.

Upgrade to Struts 2.5.31 or 6.1.2.1 or greater

Affected Packages

Maven org.apache.struts:struts2-core

Affected versions: 0 (fixed in 2.5.31)

Maven org.apache.struts:struts2-core

Affected versions: 6.0.0 (fixed in 6.1.2.1)

Related CVEs

CVE-2023-34396

Key Information

GHSA ID

GHSA-4g42-gqrg-4633

Published

June 14, 2023 9:30 AM

Last Modified

February 13, 2025 6:58 PM

CVSS Score

7.5 /10

Primary Ecosystem

Maven

Primary Package

org.apache.struts:struts2-core

GitHub Reviewed

✓ Yes

Dataset

Last updated: September 20, 2025 6:29 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.