CVE-2023-28709

Name: CVE-2023-28709
Creator: NVD / NIST
Published: 2023-05-22T11:15:09.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 51.55%

Last modified Jun 17, 2026

CVE-2023-28709 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount parameters in the query string, the limit for uploaded request parts could be bypassed with the potential for a denial of service to occur.. EPSS estimates a 51.55% chance of exploitation in the next 30 days.

Description

The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount parameters in the query string, the limit for uploaded request parts could be bypassed with the potential for a denial of service to occur.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

51.55%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-193

Affected Software

Vendor	Product	Versions	Update
Apache	Tomcat	>= 8.5.85, <= 8.5.87	—
Apache	Tomcat	>= 9.0.71, <= 9.0.73	—
Apache	Tomcat	>= 10.1.5, <= 10.1.7	—
Apache	Tomcat	11.0.0	Milestone2
Debian	Debian Linux	12.0	—
Netapp	7-Mode Transition Tool	All versions	—

References

http://www.openwall.com/lists/oss-security/2023/05/22/1Mailing List, Third Party Advisory
https://lists.apache.org/thread/7wvxonzwb7k9hx9jt3q33cmy7j97jo3jMailing List, Vendor Advisory
https://security.gentoo.org/glsa/202305-37Third Party Advisory
https://security.netapp.com/advisory/ntap-20230616-0004/Third Party Advisory
https://www.debian.org/security/2023/dsa-5521Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/05/22/1Mailing List, Third Party Advisory
https://lists.apache.org/thread/7wvxonzwb7k9hx9jt3q33cmy7j97jo3jMailing List, Vendor Advisory
https://security.gentoo.org/glsa/202305-37Third Party Advisory
https://security.netapp.com/advisory/ntap-20230616-0004/Third Party Advisory
https://www.debian.org/security/2023/dsa-5521Third Party Advisory

Timeline

Published: May 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28709?

How severe is CVE-2023-28709?

CVE-2023-28709 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 51.55% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28709?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28709?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST