CVE-2026-54607 labring CVE debrief

Who should care

Users of FastGPT versions prior to 4.15.0-beta4 should apply the patch to prevent potential unauthorized access to internal services or cloud metadata. This includes administrators and security teams responsible for managing FastGPT deployments.

Technical summary

The HTTP-tool OpenAPI schema importer in FastGPT validates only the top-level URL before passing it to SwaggerParser.bundle. This allows an authenticated team member to read internal services or cloud metadata by exploiting the remote reference resolver's ability to fetch $ref URLs without FastGPT's internal-address guard. The vulnerability affects FastGPT versions prior to 4.15.0-beta4. Evidence is limited to the CVE record and NVD detail. Further investigation is needed to determine the full scope of the vulnerability, considering potential impacts on internal services and cloud metadata access. Users should apply the patch in version 4.15.0-beta4 and review internal address guards.

Defensive priority

High priority should be given to applying the patch in version 4.15.0-beta4 to prevent potential unauthorized access.

Recommended defensive actions

• Apply the patch in version 4.15.0-beta4
• Review and update internal address guards
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is limited to the CVE record and NVD detail. Further investigation is needed to determine the full scope of the vulnerability. The CVE record was published on 2026-07-07T22:16:53.357Z and has not been modified since then. The vulnerability affects FastGPT versions prior to 4.15.0-beta4. The HTTP-tool OpenAPI schema importer validates only the top-level URL before passing it to SwaggerParser.bundle, allowing an authenticated team member to read internal services or cloud metadata.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.