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

> Remote attackers can bypass authentication in the Source Connection Test Endpoint due to improper handling in the LoginInterceptor.

- **Severity:** Medium 6.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2026
- **Updated:** 9 Jun 2026
- **Also known as:** GHSA-287g-pjcr-xhgc

## What is CVE-2026-11618?

CVE-2026-11618 is a medium-severity authentication bypass vulnerability in DTStack Taier, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-11618?


## How do I fix CVE-2026-11618?

No fix has been published for CVE-2026-11618 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11618 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11618 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11618 and fix it if it is affected.

What it is: CVE-2026-11618 is a medium-severity authentication bypass vulnerability in DTStack Taier, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11618 exists.

Affected product: DTStack Taier. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11618/ (Markdown: https://insights.sbomify.com/CVE-2026-11618/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11618
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11618
- OSV: https://osv.dev/vulnerability/CVE-2026-11618

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11618/
Summaries are generated and may contain mistakes; the official description above is the record.