CVE-2025-59347: dragonflyoss dragonfly · Improper Certificate Validation
Affects dragonflyoss dragonflySource CVE Database V5
Not known to be exploited · CVSS 2.7 Low : upgrade to 2.1.0 when convenient.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.1.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:L/E:UExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Upgrade dragonflyoss dragonfly to 2.1.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| dragonflyoss dragonfly | Affected
| Fixed in
|
AI-suggested
The primary mitigation is to upgrade Dragonfly to version 2.1.0 or later, where proper TLS certificate validation is enforced by default. Organizations should audit their deployments to identify any instances running vulnerable versions and prioritize patching. In environments where immediate upgrading is not feasible, network-level mitigations such as deploying TLS interception detection tools, strict network segmentation, and monitoring for unusual traffic patterns can help detect or reduce the risk of MitM attacks. Additionally, organizations should implement integrity verification mechanisms for files distributed via Dragonfly, such as cryptographic hashes or signatures, to detect tampering regardless of transport security. Enforcing strict access controls and monitoring the Manager component's logs for anomalies can also aid in early detection of exploitation attempts. Finally, educating network and security teams about the risks of disabled certificate validation and the importance of secure TLS configurations can prevent similar issues in other systems.
Description
Dragonfly is an open source P2P-based file distribution and image acceleration system. Prior to 2.1.0, The Manager disables TLS certificate verification in HTTP clients. The clients are not configurable, so users have no way to re-enable the verification. A Manager processes dozens of preheat jobs. An adversary performs a network-level Man-in-the-Middle attack, providing invalid data to the Manager. The Manager preheats with the wrong data, which later causes a denial of service and file integrity problems. This vulnerability is fixed in 2.1.0.