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CVE-2026-109966medium6.9

yt-dlp-web-ui through 4.0.0 Argument Injection via Service.Formats JSON-RPC Method

Unsupported when assigned

VulnCheck marked the affected products as already unsupported when this CVE was assigned. A patch may not be available. Review the vendor references for migration or mitigation guidance.

This tag describes support at assignment time, not current support for every related product.

Impact

yt-dlp-web-ui through 4.0.0 has an argument injection vulnerability, allowing unauthenticated remote attackers to inject yt-dlp options via the Service.Formats JSON-RPC method. Attackers can load attacker-chosen JSON files from the server filesystem.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

marcopiovanello · VulnCheck

yt-dlp-web-ui

1 range
VulnCheck version evidence

Package identity

pkg:golang/github.com/marcopiovanello/yt-dlp-web-ui/v4Explore github.com/marcopiovanello/yt-dlp-web-ui/v4 →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 4.0.0

semver versions

unaffected

unknown

Other versions: unaffected

Original source description

yt-dlp-web-ui through 4.0.0 contains an argument injection vulnerability that allows unauthenticated remote attackers to inject yt-dlp options by supplying a dash-prefixed url parameter to the Service.Formats JSON-RPC method. Attackers can send values like --load-info-json via /rpc/http or /rpc/ws to make yt-dlp load attacker-chosen JSON files from the server filesystem, with contents reflected in responses.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-109966

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-88 ↗

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

VulnCheck

Related →
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-13
CISA-ADP

Additional data publisher

2026-10-26

What changed

Follow changes
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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

4 sources
github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.md
third-party-advisoryVulnCheck
github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.go
technical-descriptionVulnCheck
github.com/marcopiovanello/yt-dlp-web-ui
productVulnCheck
www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-argument-injection-via-service-formats-json-rpc-method
third-party-advisoryVulnCheck