CVE-2026-1062 Overview
A Server-Side Request Forgery (SSRF) vulnerability has been discovered in xiweicheng TMS (Team Management System) up to version 2.28.0. The flaw exists in the Summary function within the file src/main/java/com/lhjz/portal/util/HtmlUtil.java. By manipulating the url argument, an authenticated attacker can force the server to make arbitrary HTTP requests to internal or external resources, potentially exposing sensitive internal services or data.
Critical Impact
This SSRF vulnerability allows remote attackers with low privileges to manipulate server-side requests, potentially accessing internal network resources, scanning internal infrastructure, or bypassing network-level security controls.
Affected Products
- xiweicheng TMS versions up to and including 2.28.0
- Applications utilizing the affected HtmlUtil.java component
Discovery Timeline
- January 17, 2026 - CVE-2026-1062 published to NVD
- January 17, 2026 - Last updated in NVD database
Technical Details for CVE-2026-1062
Vulnerability Analysis
This vulnerability is classified as CWE-918 (Server-Side Request Forgery). The SSRF flaw occurs in the Summary function of the HtmlUtil.java utility class, which processes URL parameters without proper validation. When a user supplies a malicious URL through the url argument, the application makes server-side HTTP requests to that destination without verifying whether the target is a legitimate external resource or an internal service.
SSRF vulnerabilities are particularly dangerous in cloud environments where metadata services and internal APIs may be accessible. An attacker can leverage this flaw to probe internal network infrastructure, access internal services that would otherwise be unreachable from the internet, or potentially exfiltrate sensitive data from the application server's network context.
The vulnerability can be exploited remotely by authenticated users with low privileges, and proof-of-concept exploit code has been published publicly, increasing the risk of active exploitation.
Root Cause
The root cause of this vulnerability is insufficient validation of user-supplied URLs in the Summary function of HtmlUtil.java. The function accepts URL input and processes it without implementing proper safeguards such as:
- URL scheme validation (allowing file://, gopher://, or other dangerous protocols)
- Hostname/IP address blocklisting for internal ranges (127.0.0.1, 10.x.x.x, 192.168.x.x, etc.)
- DNS rebinding protections
- Request destination verification
This lack of input sanitization allows attackers to craft malicious URLs that direct the server to make requests to arbitrary destinations.
Attack Vector
The attack is initiated remotely over the network. An authenticated attacker can exploit this vulnerability by submitting a crafted URL to the vulnerable endpoint. The exploitation flow typically involves:
- The attacker identifies the endpoint that accepts URL parameters processed by HtmlUtil.Summary()
- A malicious URL targeting internal resources is crafted (e.g., internal metadata endpoints, admin interfaces, or internal APIs)
- The server processes the URL and makes an HTTP request to the attacker-specified destination
- The response from the internal resource is returned to the attacker, potentially revealing sensitive information
The vulnerability allows attackers to bypass firewall restrictions and access internal services that are not directly exposed to the internet. For detailed technical analysis and proof-of-concept information, refer to the GitHub SSRF Vulnerability Document and VulDB entry #341630.
Detection Methods for CVE-2026-1062
Indicators of Compromise
- Unusual outbound HTTP requests from the TMS application server to internal IP ranges (127.0.0.1, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16)
- Server-side requests to cloud metadata endpoints (e.g., 169.254.169.254)
- HTTP requests with unusual URL schemes (file://, gopher://, dict://) originating from the application
- Unexpected traffic patterns from the web application tier to internal infrastructure services
Detection Strategies
- Deploy web application firewalls (WAF) with SSRF detection rules to identify and block malicious URL patterns
- Implement network monitoring to detect outbound connections from web servers to internal network segments
- Configure intrusion detection systems (IDS) to alert on requests to internal IP ranges from application servers
- Monitor application logs for URL parameters containing internal IP addresses, localhost references, or cloud metadata endpoints
Monitoring Recommendations
- Enable detailed access logging on the TMS application to capture all URL parameters processed by HtmlUtil.java
- Set up alerts for any outbound connections from the application server to non-whitelisted destinations
- Implement network segmentation monitoring to detect lateral movement attempts via SSRF
- Review DNS query logs for unusual resolution patterns from the application server
How to Mitigate CVE-2026-1062
Immediate Actions Required
- Upgrade xiweicheng TMS to a version newer than 2.28.0 if a patched version is available
- Implement URL validation and sanitization for all user-supplied URL inputs
- Deploy network-level controls to restrict the application server's ability to access internal resources
- Configure application-level blocklists for internal IP ranges and sensitive endpoints
Patch Information
At the time of publication, no official patch information has been provided by the vendor. Organizations should monitor the xiweicheng TMS repository and VulDB for updates regarding security fixes. Consider contacting the vendor directly for patch availability.
Workarounds
- Implement strict input validation for the url parameter, allowing only HTTPS URLs to trusted external domains
- Deploy an egress firewall to block the application server from accessing internal network ranges and cloud metadata services
- Use a proxy service for external URL fetching that enforces destination restrictions
- Consider disabling the affected Summary function if it is not essential to business operations
# Example: iptables rules to restrict outbound SSRF attempts from web application server
# Block access to internal networks from the application server
iptables -A OUTPUT -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -d 192.168.0.0/16 -j DROP
iptables -A OUTPUT -d 127.0.0.0/8 -j DROP
# Block access to cloud metadata endpoint
iptables -A OUTPUT -d 169.254.169.254 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
