# CVE-2026-8786: Tencent WeKnora Config API Endpoint initialization.go getKnowledgeBaseForInitialization authorization

> Attackers can bypass authorization checks in the Config API to access knowledge bases without proper permissions.

- **Severity:** Medium 5.3 (`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/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 May 2026
- **Updated:** 18 May 2026
- **Also known as:** GHSA-4cvj-xf75-4wv6

## What is CVE-2026-8786?

CVE-2026-8786 is a medium-severity missing authorization vulnerability in Tencent WeKnora, published on 18 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been found in Tencent WeKnora up to 0.3.6. Affected by this issue is the function getKnowledgeBaseForInitialization of the file internal/handler/initialization.go of the component Config API Endpoint. The manipulation of the argument kbId leads to authorization bypass. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-8786?

It affects 1 product.


Products: Tencent Weknora.

## How do I fix CVE-2026-8786?

No fix has been published for CVE-2026-8786 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8786 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8786 exists.

## Other vulnerabilities in Tencent WeKnora

- [CVE-2026-30860](https://insights.sbomify.com/CVE-2026-30860/): WeKnora: Remote Code Execution via SQL Injection Bypass in AI Database Query Tool (critical 10.0)
- [CVE-2026-30861](https://insights.sbomify.com/CVE-2026-30861/): WeKnora: Remote Code Execution (RCE) via Command Injection in MCP Stdio Configuration Validation (critical 10.0)
- [CVE-2026-22688](https://insights.sbomify.com/CVE-2026-22688/): WeKnora has Command Injection in MCP stdio test (critical 10.0)
- [CVE-2026-30855](https://insights.sbomify.com/CVE-2026-30855/): WeKnora: Broken Access Control in Tenant Management (high 8.8)
- [CVE-2025-11046](https://insights.sbomify.com/CVE-2025-11046/): Tencent WeKnora test testEmbeddingModel server-side request forgery (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8786 and fix it if it is affected.

What it is: CVE-2026-8786 is a medium-severity missing authorization vulnerability in Tencent WeKnora, published on 18 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8786 exists.

Affected product: Tencent WeKnora. 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-2026-8786/ (Markdown: https://insights.sbomify.com/CVE-2026-8786/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8786
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8786
- OSV: https://osv.dev/vulnerability/CVE-2026-8786

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8786/
Summaries are generated and may contain mistakes; the official description above is the record.