CVE-2025-69206

hemmelig allows SSRF Filter bypass via Secret Request functionality

While the SSRF filter can be bypassed, the practical impact is limited because this is a Blind SSRF, there is no response reflected. But with certain technique like response-timing, the attackers can still indicate whether or not a port is opened.

Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.

CVE-2025-69206 has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (7.3.3); upgrading removes the vulnerable code path.

Kodem intelligence

Replace hostname-based validation with IP resolution checking:

import { isIP } from 'is-ip';
import dns from 'dns/promises';

export const isPublicUrl = async (url: string): Promise<boolean> => {
    const parsed = new URL(url);
    const hostname = parsed.hostname;
    
    // Resolve hostname to IP
    let addresses: string[];
    try {
        if (isIP(hostname)) {
            addresses = [hostname];
        } else {
            addresses = await dns.resolve4(hostname).catch(() => []);
            const ipv6 = await dns.resolve6(hostname).catch(() => []);
            addresses = [...addresses, ...ipv6];
        }
    } catch {
        return false;
    }
    
    // Check resolved IPs against blocklist
    const privateRanges = [
        /^127\./,
        /^10\./,
        /^192\.168\./,
        /^172\.(1[6-9]|2\d|3[0-1])\./,
        /^169\.254\./,
        /^::1$/,
        /^fe80:/i,
        /^fc00:/i,
        /^fd/i,
    ];
    
    return addresses.length > 0 && !addresses.some(ip => 
        privateRanges.some(pattern => pattern.test(ip))
    );
};

Additionally, disable following redirects in the webhook fetch call or re-validate the URL after each redirect.

1. What is CVE-2025-69206? CVE-2025-69206 is a medium-severity server-side request forgery (SSRF) vulnerability in hemmelig (npm), affecting versions < 7.3.3. It is fixed in 7.3.3. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
2. How severe is CVE-2025-69206? CVE-2025-69206 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of hemmelig are affected by CVE-2025-69206? hemmelig (npm) versions < 7.3.3 is affected.
4. Is there a fix for CVE-2025-69206? Yes. CVE-2025-69206 is fixed in 7.3.3. Upgrade to this version or later.
5. Is CVE-2025-69206 exploitable, and should I be worried? Whether CVE-2025-69206 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2025-69206 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2025-69206? Upgrade hemmelig to 7.3.3 or later.