Quick answers
- Is CVE-2026-109967 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109967 being exploited in the wild.
- How severe is CVE-2026-109967?
- High severity, with a CVSS score of 7.5, published 13 October 2026.
- Which products and versions are affected?
- Marcopiovanello Yt-Dlp-Web-Ui through 4.0.0.
- Is there a fix for CVE-2026-109967?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-109967 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-109967?
- Check whether you run Marcopiovanello Yt-Dlp-Web-Ui at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a NULL pointer dereference in the Service.Formats JSON-RPC method caused by insufficient input validation. When a malicious URL like "--version" is passed to the ParseURL function, yt-dlp produces invalid JSON output that fails to unmarshal properly; the code does not check for unmarshaling errors before dereferencing pointers, causing an unrecovered panic that terminates the process. This is remotely exploitable without authentication via network-based JSON-RPC calls.
Affected products
- marcopiovanello yt-dlp-web-ui through 4.0.0
Timeline
- 2026-10-13: disclosed