# CVE-2026-86729: WWBN AVideo Unrestricted Authentication Attempts via get_api_preauthorize

> Unauthenticated attackers can bypass rate limits and exploit an information leak in the preauthorize API to brute-force credentials and take over accounts.

- **Severity:** Critical 9.1 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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:** 8 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-22c4-jfr4-3q58, GHSA-vvqm-mgc5-hhx3

## What is CVE-2026-86729?

CVE-2026-86729 is a critical authentication bypass vulnerability in WWBN AVideo, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

WWBN AVideo through commit e01e41ecc (no patched version available) exposes get_api_preauthorize in plugin/API/API.php as a second, undocumented login path. Unlike get_api_signIn, which enforces a rate limit of 10 attempts per 5 minutes via checkRateLimit(), get_api_preauthorize performs the same credential check with no throttling for any client, allowing unlimited remote password guessing against arbitrary accounts, including admin. The endpoint also acts as a credential oracle: it returns the message "Invalid credentials" for both correct and incorrect passwords, while the users_id field in the response body discloses the authenticated identity (users_id:1 on success, users_id:0 on failure), and a correct password establishes a session cookie that remains usable for authenticated API requests. Together these issues permit unauthenticated brute-force account takeover.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-86729?


## How do I fix CVE-2026-86729?

No fix has been published for CVE-2026-86729 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86729 being exploited?

There is no known exploitation of CVE-2026-86729 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86729 and fix it if it is affected.

What it is: CVE-2026-86729 is a critical authentication bypass vulnerability in WWBN AVideo, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-86729 in the wild and no public exploit code.

Affected product: WWBN AVideo. 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-2026-86729/ (Markdown: https://insights.sbomify.com/CVE-2026-86729/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86729
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86729
- OSV: https://osv.dev/vulnerability/CVE-2026-86729

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86729/
Summaries are generated and may contain mistakes; the official description above is the record.