CVE-2026-117553Published
Umbraco CMS before 17.7.2 and 18.2.2 Account Takeover via Host Header Poisoning
Exact source revision recorded 27 Oct 2026 15:09:21 UTC. It does not establish the source's current position. Latest evidence.
Explicit identifiers and source references
These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.
CVE-2026-117553 · Microsoft / collected KEV context
cve-program · CVE-2026-117553
- https://github.com/umbraco/Umbraco-CMS/commit/490b9b27dcbb8fb3fe868a36203590968b0569d6
- https://github.com/umbraco/Umbraco-CMS
- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-rpv9-qp4c-g469
- https://github.com/umbraco/Umbraco-CMS/blob/release-18.2.1/src/Umbraco.Cms.Api.Management/Middleware/BackOfficeAuthorizationInitializationMiddleware.cs#L74-L112
- https://www.vulncheck.com/advisories/umbraco-cms-before-17.7.2-and-18.2.2-account-takeover-via-host-header-poisoning
Current operational correlations are not mixed into this historical source record. Open latest evidence to discover current connections.