Internal data disclosure via unguarded remote references
Published Jul 7, 2026 · Updated Jul 7, 2026
SSRF in FastGPT before 4.15.0-beta4 allows remote authenticated users to read internal HTTP services via crafted OpenAPI schemas. The HTTP-tool importer checks only the submitted document URL, while SwaggerParser.bundle fetches nested $ref URLs without the internal-address guard and inlines their responses. Any authenticated team member, including a read-only member, can reach internal services and retrieve cloud instance metadata or credentials.
Summary
What happened
SSRF in FastGPT before 4.15.0-beta4 allows remote authenticated users to read internal HTTP services via crafted OpenAPI schemas. The HTTP-tool importer checks only the submitted document URL, while SwaggerParser.bundle fetches nested $ref URLs without the internal-address guard and inlines their responses. Any authenticated team member, including a read-only member, can reach internal services and retrieve cloud instance metadata or credentials.
The record
- CVE
- CVE-2026-54607
- Published
- Jul 7, 2026
- Updated
- Jul 7, 2026
- Vendor
- Labring
- Product
- FastGPT
- Classifications
- CWE-918, T1552.005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 7, 2026CVE publishedPublication date reported by the CVE source.
- Jul 7, 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=< 4.15.0-beta4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- Nested $ref SSRF proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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