---
title: "CVE-2026-83594: Apache Wicket - Denial of Service"
description: "Apache Wicket 9.14.0 to 9.24.0 and 10.0.0 to 10.11.0 contain a denial of service caused by excessive memory allocation from unvalidated file size in FileUploadToResourceField callback, letting attackers exhaust server heap remotely without authentication, exploit requires calling UploadInfo#get()."
url: https://panop.io/threat-heartbeat/CVE-2026-83594/
---

# CVE-2026-83594 Apache Wicket - Denial of Service

Apache Wicket 9.14.0 to 9.24.0 and 10.0.0 to 10.11.0 contain a denial of service caused by excessive memory allocation from unvalidated file size in FileUploadToResourceField callback, letting attackers exhaust server heap remotely without authentication, exploit requires calling UploadInfo#get().

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83594)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

1 November 2026

Updated

3 November 2026

Weakness

[CWE-789](https://cwe.mitre.org/data/definitions/789.html)

## Vendor fix

Upgrade to Apache Wicket 9.25.0 or 10.12.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-83594](https://nvd.nist.gov/vuln/detail/CVE-2026-83594)
- [https://lists.apache.org/thread.html/h5lxspxg746pzjd437n3n7mq5t3sfbcb](https://lists.apache.org/thread.html/h5lxspxg746pzjd437n3n7mq5t3sfbcb)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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