Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck
CVE-2026-109967yt-dlp-web-ui through 4.0.0 NULL Pointer Dereference DoS via Service.Formats
High 7.5
In plain English
A high-severity null pointer dereference in yt-dlp-web-ui from marcopiovanello. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 53.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
yt-dlp-web-ui through 4.0.0 contains a NULL pointer dereference vulnerability in the Service.Formats JSON-RPC method that allows remote unauthenticated attackers to crash the server. Attackers can send a single request with a url value like --version, causing invalid yt-dlp JSON output and an unrecovered panic that terminates the process.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| marcopiovanello | yt-dlp-web-ui | 0 – through 4.0.0 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md third-party-advisory, exploit
- https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/rpc/service.go technical-description
- https://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go technical-description
- https://github.com/marcopiovanello/yt-dlp-web-ui product
- VulnCheck Advisory: yt-dlp-web-ui through 4.0.0 NULL Pointer Dereference DoS via Service.Formats third-party-advisory