CVE-2026-82879 DataEase before 2.10.26 Access Control Bypass via Share Tickets
Attackers can bypass share access controls to read unauthorized data or disrupt sharing features by exploiting missing ownership checks and ticket validation flaws.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82879?
CVE-2026-82879 is a medium-severity missing authorization vulnerability in dataease, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
DataEase before 2.10.26 contains multiple access control defects in the sharing link module. Tickets are not bound to the target share UUID, so a valid ticket issued for one share can be reused against another (ShareTicketManage.validateTicket / POST /de2api/share/proxyInfo). The POST /de2api/share/validate endpoint issues a LinkToken after password verification without requiring a ticket, bypassing the 'ticket mandatory' policy. Additionally, the ticket create and delete endpoints (POST /de2api/ticket/saveTicket, POST /de2api/ticket/delTicket) lack share-ownership checks, allowing an authenticated user who knows another user's ticket to modify, rebind, or delete it (denial of service), and GET /de2api/share/queryRelationByUserId/{uid} allows authenticated users to enumerate other users' share mappings.
Weakness: CWE-863
Which versions are affected by CVE-2026-82879?
How do I fix CVE-2026-82879?
No fix has been published for CVE-2026-82879 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-82879 being exploited?
There is no known exploitation of CVE-2026-82879 in the wild and no public exploit code.
Sources
Also known as GHSA-9h54-39gh-5qfg, GHSA-p7cf-5v9w-9rvj.