Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-109167
TDuckCloud tduck-survey-form — TDuck survey form through 6.0 Authorization Bypass via User-Controlled Theme ID in POST /user/form/theme/save
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N L N N L N 5.3 .0019 8.0 —
AFFECTED
Product Versions Fixed
tduck-survey-form unspecified —
TIMELINE
Oct 12 Reserved by VulnCheck
Oct 12 Published (CNA: VulnCheck)
Oct 14 EXPLOIT PUBLISHED — CVE-2026-109167 (TDuckCloud tduck-survey-form). Public exploit reference added.
Description
TDuck survey form through 6.0 contains an insecure direct object reference vulnerability in the saveFormTheme handler that allows authenticated users to overwrite other users' form themes. Attackers whose form has no theme can submit another form's sequential theme id with their own formKey, replacing its colours and image URLs and removing the victim's theme.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| October 12, 2026 | Reserved | Reserved by VulnCheck |
| October 12, 2026 | Published | Published (CNA: VulnCheck) |
| October 14, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-109167 (TDuckCloud tduck-survey-form). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| TDuckCloud | tduck-survey-form | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-109167 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
