CVE-2026-46806: Oracle WebCenter Content Auth Bypass Flaw

CVE-2026-46806 Overview

CVE-2026-46806 affects the Content Server component of Oracle WebCenter Content within Oracle Fusion Middleware. The flaw is categorized as an open redirect issue [CWE-601] and impacts version 14.1.2.0.0. An unauthenticated attacker with network access via HTTPS can exploit the vulnerability when a user performs an action triggered by the attacker. Successful exploitation produces a scope change, meaning impact extends beyond Oracle WebCenter Content to additional products. Attackers can gain unauthorized access to critical data and perform limited unauthorized modifications.

Critical Impact
Remote attackers can redirect authenticated users to attacker-controlled destinations, leading to unauthorized access to confidential data and partial integrity loss across products beyond WebCenter Content.

Affected Products

Oracle WebCenter Content 14.1.2.0.0
Oracle Fusion Middleware (Content Server component)
Downstream products affected by scope change

Discovery Timeline

2026-06-17 - CVE CVE-2026-46806 published to NVD
2026-06-17 - Last updated in NVD database
June 2026 - Oracle Critical Security Patch Update advisory released

Technical Details for CVE-2026-46806

Vulnerability Analysis

The vulnerability resides in the Content Server component of Oracle WebCenter Content. The component fails to validate destination URLs supplied through HTTP request parameters. An attacker crafts a link that points to a legitimate WebCenter Content endpoint but embeds an attacker-controlled redirect target. When a victim clicks the link, the server returns a response that redirects the browser to the malicious destination.

The issue is exploitable over the network with low attack complexity and requires no authentication. User interaction is required because the victim must click the crafted link. The scope changes during exploitation, allowing the impact to extend to additional Oracle products that trust WebCenter Content sessions or tokens. Confidentiality impact is high, while integrity impact is limited and availability is unaffected.

Root Cause

The Content Server accepts user-controlled input that defines a redirect target without enforcing an allowlist of trusted domains or validating that the target is internal. This URL Redirection to Untrusted Site issue [CWE-601] enables attacker-controlled navigation from a trusted Oracle origin.

Attack Vector

An unauthenticated attacker constructs a URL pointing at a vulnerable Oracle WebCenter Content endpoint. The URL includes a redirect parameter referencing an external attacker-controlled domain. The attacker distributes the link through phishing email, instant messaging, or a malicious web page. When a user clicks the link, the WebCenter Content server responds with an HTTP redirect to the attacker's site, which may host credential harvesting pages or session-stealing scripts. Because Oracle reports a scope change, harvested credentials or tokens can affect other integrated Oracle Fusion Middleware products.

No verified public proof-of-concept code is available for this vulnerability. Refer to the Oracle Security Alert for vendor-supplied technical details.

Detection Methods for CVE-2026-46806

Indicators of Compromise

HTTP 3xx responses from WebCenter Content endpoints with Location headers pointing to external, non-Oracle domains
Inbound requests containing suspicious redirect parameters such as url=, redirect=, return=, or next= with absolute external URLs
Phishing email lures referencing Oracle WebCenter Content URLs followed by encoded redirect targets
Web proxy logs showing user navigation from WebCenter Content hostnames to newly registered or low-reputation domains

Detection Strategies

Inspect HTTP access logs for requests to WebCenter Content paths that include redirect parameters with fully qualified external URLs.
Correlate user-agent referer chains where Oracle WebCenter Content hostnames precede credential entry pages on external domains.
Deploy web application firewall rules that flag redirect parameters containing protocol schemes or external hostnames.

Monitoring Recommendations

Enable verbose access logging on the Content Server and forward logs to a SIEM for correlation.
Alert on outbound HTTP 302 responses from Oracle WebCenter Content that reference domains outside an approved allowlist.
Track click-through telemetry from email security gateways for URLs targeting WebCenter Content hosts.

How to Mitigate CVE-2026-46806

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert to all instances running WebCenter Content 14.1.2.0.0.
Inventory all Oracle Fusion Middleware deployments and confirm version exposure to this CVE.
Notify users of active phishing risk that leverages trusted Oracle URLs as a delivery mechanism.
Restrict access to WebCenter Content administrative endpoints to known internal networks where feasible.

Patch Information

Oracle addressed CVE-2026-46806 in the June 2026 Critical Patch Update. Administrators should download and apply the patch listed in the Oracle Security Alert for Oracle WebCenter Content 14.1.2.0.0. Validate patch installation through Oracle's opatch utility and confirm the Content Server build version after deployment.

Workarounds

Place a reverse proxy or web application firewall in front of WebCenter Content to strip or validate redirect parameters against a domain allowlist.
Disable or restrict any Content Server endpoints that accept redirect targets if business operations permit.
Deploy browser warning banners when users navigate from Oracle hostnames to unfamiliar external domains.
Train users to inspect full URLs before clicking links that reference Oracle WebCenter Content.

bash

# Example WAF rule concept: block external absolute URLs in redirect parameters
# ModSecurity-style pseudocode
SecRule ARGS_NAMES "@rx ^(url|redirect|return|next|dest)$" \
    "chain,deny,status:403,id:1004601,msg:'Potential open redirect CVE-2026-46806'"
    SecRule ARGS "@rx ^https?://(?!([a-z0-9.-]+\.)?example\.com/)" "t:lowercase"