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VulnerabilityPublished

CVE-2026-46616: Umbraco-CMS · Open Redirect

Affects Umbraco-CMSSource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium : upgrade to 17.4.0 or 13.14.0 when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 17.4.0, 13.14.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Umbraco-CMS and umbraco/Umbraco-CMS to 17.4.0 or 13.14.0.

Affected software

ProductAffectedFixed in
umbracoUmbraco-CMSAffected
  • >=17.3.0-rc <17.4.0
Fixed in
  • 17.4.0
umbracoUmbraco-CMSAffected
  • <13.14.0
Fixed in
  • 13.14.0
GitHubumbraco/Umbraco-CMSpkg:github/umbraco/Umbraco-CMSOther threatsAffected
  • <13.14.0
  • >=17.3.0-rc <17.4.0
Fixed in
  • 13.14.0
  • 17.4.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Umbraco CMS to version 13.14.0 or later, or 17.4.0 or later, where the vulnerability has been patched. No other official remediation or temporary fixes are indicated. Patch status is confirmed by the vendor advisory stating the fix is included in these versions.

Description

Umbraco CMS versions prior to 13.14.0 and 17.4.0 contain an open redirect vulnerability in some Surface Controllers that handle member-related operations. These controllers fail to properly validate redirect URLs derived from user-controlled query parameters, allowing malicious redirection. This vulnerability has been addressed in versions 13.14.0 and 17.4.0.

References

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