# CVE-2026-111699: Niefy wx-api through 0.8.2 Authentication Bypass via Unverified openid Cookie

> Attackers can bypass authentication by supplying a raw openid cookie to read user data and modify fan tags in the Niefy wx-api service.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Oct 2026
- **Updated:** 21 Oct 2026
- **Also known as:** GHSA-jqmh-3xm7-92j3

## What is CVE-2026-111699?

CVE-2026-111699 is a medium-severity authentication bypass vulnerability in niefy wx-api, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Niefy wx-api through 0.8.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to impersonate WeChat fans by supplying a raw openid cookie to fan-facing controllers. Attackers knowing a victim's openid can call /wxUser/getUserInfo and /wxUserTags endpoints to read nickname, phone, unionid and tags, and add or remove fan tags.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-111699?


## How do I fix CVE-2026-111699?

No fix has been published for CVE-2026-111699 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111699 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111699 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111699 and fix it if it is affected.

What it is: CVE-2026-111699 is a medium-severity authentication bypass vulnerability in niefy wx-api, published on 16 Oct 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-2026-111699 exists.

Affected product: niefy wx-api. 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-2026-111699/ (Markdown: https://insights.sbomify.com/CVE-2026-111699/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111699
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111699
- OSV: https://osv.dev/vulnerability/CVE-2026-111699

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111699/
Summaries are generated and may contain mistakes; the official description above is the record.