# CVE-2026-56345: AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint

> Attackers can hijack any user session, including admin, by exploiting an authorization bypass in the Meet plugin's video upload endpoint.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:** 20 Jun 2026
- **Updated:** 23 Jun 2026
- **Also known as:** GHSA-jfp8-jxr2-p2jh, GHSA-qxvm-r42f-5p8j

## What is CVE-2026-56345?

CVE-2026-56345 is a critical authentication bypass vulnerability in AVideo, published on 20 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

AVideo through 29.0 contains an authorization bypass vulnerability in the Meet plugin's uploadRecordedVideo.json.php endpoint that derives the target users_id from the uploaded filename without verification. An attacker with knowledge of the Meet shared secret can craft a malicious file upload with a filename containing an arbitrary users_id to invoke passwordless User->login() and establish an authenticated session as any user including admin. Attackers can obtain the Meet shared secret through path-traversal vulnerabilities or timing attacks against checkToken.json.php, then POST a crafted file to uploadRecordedVideo.json.php with a filename like '1-anything.mp4' to hijack admin sessions and gain full account takeover.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-56345?

2 open source packages ship an affected version, including WWBN/AVideo.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `WWBN/AVideo` | Packagist | All versions to 29.0 | None |
| `WWBN/AVideo` | Packagist | All versions to 29.0 | None |

## How do I fix CVE-2026-56345?

No fix has been published for CVE-2026-56345 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56345 being exploited?

There is no known exploitation of CVE-2026-56345 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56345 and fix it if it is affected.

What it is: CVE-2026-56345 is a critical authentication bypass vulnerability in AVideo, published on 20 Jun 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-2026-56345 in the wild and no public exploit code.

Affected packages and fixed versions:
- WWBN/AVideo (Packagist): affected all versions up to 29.0; no fix listed
- WWBN/AVideo (Packagist): affected all versions up to 29.0; no fix listed

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-2026-56345/ (Markdown: https://insights.sbomify.com/CVE-2026-56345/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56345
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56345
- OSV: https://osv.dev/vulnerability/CVE-2026-56345

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56345/
Summaries are generated and may contain mistakes; the official description above is the record.