CVE-2026-109967
yt-dlp-web-ui through 4.0.0 NULL Pointer Dereference DoS via Service.Formats
marcopiovanello yt-dlp-web-ui
CVSS
8.7HighExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 16 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.56%Chance of exploitation activity in the next 30 days, higher than 45% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- yt-dlp-web-uiaffected: all versions through 4.0.0CVE List
References 5
- vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-null-pointer-dereference-dos-via-service-formatsAdvisoryvia CVE List
- github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.mdExploitvia CVE List
- github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/rpc/service.goReferencevia CVE List
- github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.goReferencevia CVE List
- github.com/marcopiovanello/yt-dlp-web-uiReferencevia CVE List