CVE-2026-109967 — Marcopiovanello
HIGHCVE-2026-109967 is a high-severity (CVSS 7.5) NULL Pointer Dereference vulnerability. No vendor fix is recorded yet; mitigation options are listed below.
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.…
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.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-109967 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2026-109967 in your dependencies?
Find it across , including transitive dependencies.