CVE-2025-59353

Workarounds

There are no effective workarounds, beyond upgrading.

References

A third party security audit was performed by Trail of Bits, you can see the full report.

If you have any questions or comments about this advisory, please email us at [email protected].

A peer can obtain a valid TLS certificate for arbitrary IP addresses, effectively rendering the mTLS authentication useless. The issue is that the Manager’s Certificate gRPC service does not validate if the requested IP addresses “belong to” the peer requesting the certificate, that is, if the peer connects from the same IP address as the one provided in the certificate request.

if addr, ok := p.Addr.(*net.TCPAddr); ok {
       ip = addr.IP.String()
} else {
       ip, _, err = net.SplitHostPort(p.Addr.String())
       if err != nil {
             return nil, err
       }
}
// Parse csr.
[skipped]
// Check csr signature.
// TODO check csr common name and so on.
if err = csr.CheckSignature(); err != nil {
       return nil, err
}
[skipped]
// TODO only valid for peer ip
// BTW we need support both of ipv4 and ipv6.
ips := csr.IPAddresses
if len(ips) == 0 {
       // Add default connected ip.
       ips = []net.IP{net.ParseIP(ip)}
}

Kodem intelligence

• Dragonfy v2.1.0 and above.

1. What is CVE-2025-59353? CVE-2025-59353 is a high-severity security vulnerability in github.com/dragonflyoss/dragonfly (go), affecting versions < 2.1.0. It is fixed in 2.1.0.
2. Which packages are affected by CVE-2025-59353?
   • github.com/dragonflyoss/dragonfly (go) (versions < 2.1.0)
   • d7y.io/dragonfly/v2 (go) (versions < 2.1.0)
3. Is there a fix for CVE-2025-59353? Yes. CVE-2025-59353 is fixed in 2.1.0. Upgrade to this version or later.
4. Is CVE-2025-59353 exploitable, and should I be worried? Whether CVE-2025-59353 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
5. What actually determines whether CVE-2025-59353 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.
6. How do I fix CVE-2025-59353?
   • Upgrade github.com/dragonflyoss/dragonfly to 2.1.0 or later
   • Upgrade d7y.io/dragonfly/v2 to 2.1.0 or later