---
title: "CVE-2026-82840: Apache Wicket - Authentication Bypass"
description: "Apache Wicket 8.18.0-8.19.0, 9.23.0-9.24.0, and 10.9.0-10.11.0 contain a session fixation vulnerability caused by failure to renew session ID on re-authentication in AuthenticatedWebSession, letting attackers fixate sessions, exploit requires attacker to plant a session ID in victim's browser."
url: https://panop.io/threat-heartbeat/CVE-2026-82840/
---

# CVE-2026-82840 Apache Wicket - Authentication Bypass

Apache Wicket 8.18.0-8.19.0, 9.23.0-9.24.0, and 10.9.0-10.11.0 contain a session fixation vulnerability caused by failure to renew session ID on re-authentication in AuthenticatedWebSession, letting attackers fixate sessions, exploit requires attacker to plant a session ID in victim's browser.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-82840)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:N/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-384](https://cwe.mitre.org/data/definitions/384.html)

## Vendor fix

Upgrade to Apache Wicket versions 8.20.0, 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-2026-82840](https://nvd.nist.gov/vuln/detail/CVE-2026-82840)
- [https://lists.apache.org/thread.html/q812kjb74x2pt6956w0pcmkc4wwj95l9](https://lists.apache.org/thread.html/q812kjb74x2pt6956w0pcmkc4wwj95l9)

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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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