PatchTheCVECVE-2026-83594: Memory allocation with an excessive size value in Apache Wicket. org.apache.wicket.markup.html.form.upload.re
CVE-2026-83594 is a high-severity flaw (CVSS 8.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Memory allocation with an excessive size value in Apache Wicket. org.apache.wicket.markup.html.form.upload.resource.FileUploadToResourceField uploads files to a separately mounted resource rather than through a form, and is told the outcome afterwards over its own Ajax callback. That callback reads the request parameter filesInfo, a JSON array carrying a client file name, a size and a content type for each file, and turns it into the list of Fil
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 8.3 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | n/a |
| CISA exploited list | No |
| Weakness | CWE-789 |
| Published | 2026-11-01 |
| Last modified | 2026-11-01 |
Last updated 2026-11-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- Vulners Bulletins: CVE-2026-83594 2026-11-01
- VulDB Recent Entries: CVE-2026-83594 | Apache Wicket up to 9.24.0/10.11.0 FileUploadToResourceField allocation of resources 2026-11-01
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-83594?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-83594 being exploited?
CVE-2026-83594 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-83594 affect?
CVE-2026-83594 affects affected software. Severity is high (CVSS 8.3). Memory allocation with an excessive size value in Apache Wicket. org.apache.wicket.markup.html.form.upload.resource.FileUploadToResourceField uploads files to a separately mounted resource rather than through a form, and is told the outcom
How urgent is CVE-2026-83594?
Priority 39/100. High severity; Remotely exploitable, no login, no user action; On your watchlist