Internal service disclosure via IPv6 guard bypass
Published Aug 13, 2026 · Updated Aug 13, 2026
SSRF in Flyto2 Core before 2.28.0 allows remote authenticated users to read IPv6 loopback services through HTTP modules. The is_private_ip() classifier omits the IPv6 unspecified address from its private ranges and blocked hostnames, so http.get, http.request, and http.batch accept URLs targeting [::]. The attacker must control a module URL parameter; access is limited to services listening on IPv6 loopback at allowed ports, with no reported write impact.
Summary
What happened
SSRF in Flyto2 Core before 2.28.0 allows remote authenticated users to read IPv6 loopback services through HTTP modules. The is_private_ip() classifier omits the IPv6 unspecified address from its private ranges and blocked hostnames, so http.get, http.request, and http.batch accept URLs targeting [::]. The attacker must control a module URL parameter; access is limited to services listening on IPv6 loopback at allowed ports, with no reported write impact.
The record
- CVE
- CVE-2026-73530
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Vendor
- Flytohub
- Product
- Flyto2 Core
- Classifications
- CWE-918
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- Aug 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2.28.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- IPv6 unspecified-address loopback PoCproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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