NULL pointer dereference in Marcopiovanello Yt-Dlp-Web-Ui
CVE-2026-109967
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/marcopiovanello/yt-dlp-web-ui (product)
- github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go (technical-description)
- github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/rpc/service.go (technical-description)
- github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-ma… (exploit, third-party-advisory)
- www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-null-pointer-dereferen… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109967?
- CVE-2026-109967 is a high-severity vulnerability in Marcopiovanello Yt-Dlp-Web-Ui, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-10-13.
- How severe is CVE-2026-109967?
- High severity. CVSS v3 base score is 7.5 out of 10.