CVE-2026-109967

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.56% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.4% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-16.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-13 14:00Z15 DAYS AGO

Last updated

2026-10-16 21:57Z12 DAYS AGO

Reserved

2026-10-13

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

79cc9f2ed8d1437868e6a2e698fd0661dad0fd0766c4e466d2b06d171ddb20cb

• github.comhttps://github.com/vazzzy071-crypto/security-advisories/blob/main/advisories/2026-10-marcopiovanello-yt-dlp-web-ui-rpc-arg-injection.mdthird-party-advisoryexploit
• github.comhttps://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/rpc/service.gotechnical-description
• github.comhttps://github.com/marcopiovanello/yt-dlp-web-ui/blob/v4.0.0/server/formats/parser.gotechnical-description
• github.comhttps://github.com/marcopiovanello/yt-dlp-web-uiproduct
• www.vulncheck.comVulnCheck Advisory: yt-dlp-web-ui through 4.0.0 NULL Pointer Dereference DoS via Service.Formatshttps://www.vulncheck.com/advisories/yt-dlp-web-ui-through-4.0.0-null-pointer-dereference-dos-via-service-formatsthird-party-advisory