CVE-2023-26470 In XWiki Platform, saving a document with a large object number leads to persistent OOM errors
Attackers can cause persistent out-of-memory errors and service unavailability by adding objects with excessively large numbers to XWiki pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-26470?
CVE-2023-26470 is a medium-severity denial of service vulnerability in Xwiki Xwiki, published on 2 Mar 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It's possible to make the farm unusable by adding an object to a page with a huge number (e.g. 67108863). Most of the time this will fill the memory allocated to XWiki and make it unusable every time this document is manipulated. This issue has been patched in XWiki 14.0-rc-1.
Which versions are affected by CVE-2023-26470?
2 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-oldcore. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.xwiki.platform:xwiki-platform-oldcore Maven | All versions | 14.0-rc-1 |
org.xwiki.platform:xwiki-platform-oldcore Maven | All versions | 14.0-rc-1 |
Products include Xwiki Xwiki.
How do I fix CVE-2023-26470?
Upgrade org.xwiki.platform:xwiki-platform-oldcore to 14.0-rc-1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-26470 being exploited?
There is no known exploitation of CVE-2023-26470 in the wild and no public exploit code.
Other vulnerabilities in Xwiki Xwiki
- CVE-2025-24893 XWiki Platform Eval Injection
- CVE-2025-53836 XWiki Rendering is vulnerable to RCE attacks when processing nested macros
- CVE-2024-55662 XWiki allows remote code execution through the extension sheet
- CVE-2024-55877 XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList
- CVE-2024-37901 XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet
Sources
Also known as GHSA-92wp-r7hm-42g7.