CVE-2026-68536: Apache MyFaces Core SSRF Vulnerability

CVE-2026-68536 Overview

CVE-2026-68536 is a Server-Side Request Forgery (SSRF) and Local File Inclusion (LFI) vulnerability in Apache MyFaces Core. The flaw is tracked under CWE-918, which covers server-side request forgery weaknesses. Attackers can leverage the issue to coerce the application into issuing requests to unintended internal or external resources, or to include local files within the server context. Older, unsupported releases may also be affected. The Apache MyFaces project has published fixes in versions 2.3.12, 2.3-next-M9, 3.0.4, 4.0.4, and 4.1.4.

Critical Impact
Successful exploitation enables attackers to reach internal services, read sensitive local files, and pivot within networks hosting Apache MyFaces applications.

Affected Products

Apache MyFaces Core versions prior to 2.3.12
Apache MyFaces Core versions prior to 3.0.4 and 4.0.4
Apache MyFaces Core versions prior to 4.1.4 and 2.3-next-M9

Discovery Timeline

2026-09-16 - CVE CVE-2026-68536 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-68536

Vulnerability Analysis

Apache MyFaces Core is a widely deployed Jakarta Server Faces (JSF) implementation used to build Java web applications. The vulnerability allows an attacker to influence a server-side request or file inclusion operation. When the application resolves an attacker-controlled resource reference, MyFaces issues the outbound request or reads the target file without sufficient validation. This behavior combines SSRF and LFI primitives in a single flaw. Attackers can retrieve metadata from cloud instance endpoints, probe internal-only services, or exfiltrate local configuration files.

Root Cause

The root cause is insufficient validation of resource identifiers processed by MyFaces Core. The component accepts URIs or paths that should be constrained to trusted origins. Because the request or file read is executed with the server's privileges, the destination bypasses network segmentation and file-system access controls that would normally restrict a remote client.

Attack Vector

An unauthenticated or authenticated attacker submits a crafted request to a MyFaces-powered endpoint that processes resource references. The payload directs MyFaces to fetch a URL under the attacker's control or a sensitive local file such as /etc/passwd or application configuration files. The server returns the resulting content or performs side effects against internal systems. See the Apache Mailing List Discussion and the Openwall OSS-Security Update for coordination details.

No verified public proof-of-concept code is available at the time of publication. Defenders should treat the flaw as exploitable given the low complexity typical of SSRF and LFI weaknesses.

Detection Methods for CVE-2026-68536

Indicators of Compromise

Outbound HTTP requests from MyFaces application servers to cloud metadata endpoints such as 169.254.169.254 or internal-only IP ranges.
Application logs containing resource references with file://, http://localhost, or path traversal sequences like ../ targeting MyFaces request handlers.
Unexpected reads of sensitive local files (/etc/passwd, application.properties, keystore files) by the Java application process.

Detection Strategies

Inspect web application firewall (WAF) logs for requests carrying URL or path parameters that reference internal address space, loopback interfaces, or the file:// scheme.
Correlate MyFaces request handlers with unusual outbound connections initiated by the JVM process to identify SSRF attempts.
Baseline normal file access patterns for the application user and alert on reads of system or credential files.

Monitoring Recommendations

Enable verbose logging on MyFaces resource-handling components and forward events to a centralized analytics pipeline.
Monitor egress traffic from application servers and block requests to link-local, loopback, and RFC1918 ranges unless explicitly required.
Track process-level file-system telemetry on Java application servers to detect anomalous local file access.

How to Mitigate CVE-2026-68536

Immediate Actions Required

Upgrade Apache MyFaces Core to 2.3.12, 2.3-next-M9, 3.0.4, 4.0.4, or 4.1.4 depending on the branch in use.
Inventory all Java applications that depend on MyFaces Core and prioritize internet-facing deployments for immediate patching.
Review application logs since the vulnerable version was deployed for signs of SSRF or LFI exploitation attempts.

Patch Information

The Apache MyFaces project has released fixed versions 2.3.12, 2.3-next-M9, 3.0.4, 4.0.4, and 4.1.4. Consult the Apache Mailing List Discussion for upgrade guidance and the Openwall OSS-Security Update for the coordinated disclosure notice.

Workarounds

Restrict outbound network access from application servers to only the destinations required for business functionality.
Deploy WAF rules that block resource parameters containing file://, loopback addresses, cloud metadata IPs, or directory traversal sequences.
Run the Java application process under a least-privilege service account with read access limited to application-required files.

bash

# Configuration example: verify installed MyFaces Core version
find / -name 'myfaces-impl-*.jar' -type f 2>/dev/null
# Expected patched versions: 2.3.12, 2.3-next-M9, 3.0.4, 4.0.4, or 4.1.4