# CVE-2026-84483: WWBN AVideo Unauthenticated Password Hash Oracle via encryptPass.json.php

> Unauthenticated attackers can forge HMAC tokens to submit arbitrary passwords and obtain encrypted hashes, facilitating offline password cracking.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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:** 1 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-748m-wrhq-3hc2, GHSA-q92q-q2f7-v4fc

## What is CVE-2026-84483?

CVE-2026-84483 is a medium-severity authentication bypass vulnerability in WWBN AVideo, published on 1 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 9c39d8c8 contains an incomplete authentication bypass in encryptPass.json.php that allows unauthenticated attackers to compute valid HMAC tokens using the public site URL and current time. Attackers can forge authentication tokens by computing hash_hmac with the site's base URL as the key and submit arbitrary passwords to receive encrypted hashes, enabling offline precomputation attacks against stolen password databases.

Weakness: CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2026-84483?


## How do I fix CVE-2026-84483?

No fix has been published for CVE-2026-84483 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-84483 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84483 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-84483 and fix it if it is affected.

What it is: CVE-2026-84483 is a medium-severity authentication bypass vulnerability in WWBN AVideo, published on 1 Sep 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-2026-84483 exists.

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-2026-84483/ (Markdown: https://insights.sbomify.com/CVE-2026-84483/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-84483
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-84483
- OSV: https://osv.dev/vulnerability/CVE-2026-84483

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-84483/
Summaries are generated and may contain mistakes; the official description above is the record.