CVE-2025-59353: dragonflyoss dragonfly Improper Certificate Validation

Vulnerability summary

CVE-2025-59353 is a high (CVSS 7.7) Improper Certificate Validation vulnerability in dragonflyoss dragonfly. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-09-2025
   PublishedVulnerability first disclosed.
2. 18-09-2025
   Last modifiedVulnerability information updated.

Description

Dragonfly is an open source P2P-based file distribution and image acceleration system. Prior to 2.1.0, 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. This vulnerability is fixed in 2.1.0.

• CWE-295Improper Certificate ValidationThe product does not validate, or incorrectly validates, a certificate.
• CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.