No exploitation reported

CVE-2023-28709

No exploitation reported by the sources we read.

Published2023-05-22
WeaknessCWE-193

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2023-05-2211:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-28709?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-28709?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache Tomcat

Branch	Affected	Fixed in	Source
8.5	≥ 8.5.85, ≤ 8.5.87	no fix published	NVD
9.0	≥ 9.0.71, ≤ 9.0.73	no fix published	NVD
10.1	≥ 10.1.5, ≤ 10.1.7	no fix published	NVD
11.0	= 11.0.0	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
12.0	= 12.0	no fix published	NVD

Netapp 7-mode transition tool

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

lists.apache.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-02-20
OpenCVESSVC decisionnone—
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-193read 2026-10-23
FIRST EPSSEPSS score48.0 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2023-05-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-28709?

Is CVE-2023-28709 actively exploited?

Active exploitation of CVE-2023-28709 has not been confirmed. Its EPSS score was 48.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-28709?

CVE-2023-28709 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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