Directus: Open Redirect via Parser Bypass in OAuth2/SAML Authentication Flow

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2026-35410: 0.26% estimated exploitation activity in the next 30 days; percentile 17.92 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An open redirect vulnerability exists in the login redirection logic. The isLoginRedirectAllowed function fails to correctly identify certain malformed URLs as external, allowing attackers to bypass redirect allow-list validation and redirect users to arbitrary external domains upon successful authentication. Details A parser differential exists between the server-side URL validation logic and how modern browsers interpret URL path segments containing backslashes. Specifically, certain URL patterns are incorrectly classified as safe relative paths by the server, but are normalized by browsers into external domain references. This is particularly impactful in SSO authentication flows (e.g., OAuth2 providers), where an attacker can craft a login URL that redirects the victim to an attacker-controlled site immediately after successful authentication, without any visible indication during the login process. Impact - Phishing: Users may be silently redirected to…

Published by the source

4 Apr 2026, 06:09 UTC

Last modified by the source

18 Apr 2026, 11:30 UTC

Source last checked

26 Oct 2026, 12:48 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-cf45-hxwj-4cfj

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-cf45-hxwj-4cfj

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# Patch Next advisory brief: CVE-2026-35410

Advisory: Directus: Open Redirect via Parser Bypass in OAuth2/SAML Authentication Flow
IDs: CVE-2026-35410, GHSA-cf45-hxwj-4cfj
Record: https://patchnext.com/advisories/cve-2026-35410 (revision 2, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: directus 11.16.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm directus: affected < 11.16.1; fixed in 11.16.1

## Suggested inspection (read-only)
- `npm ls directus --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on directus.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-cf45-hxwj-4cfj (OSV record GHSA-cf45-hxwj-4cfj lists affected ranges: npm directus >=0 <11.16.1 (fixed))
- Verified: https://github.com/advisories/GHSA-cf45-hxwj-4cfj (GitHub-reviewed advisory GHSA-cf45-hxwj-4cfj lists affected ranges: npm directus >=0 <11.16.1)

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