CVE-2026-55245

Bifrost is an enterprise AI gateway for routing requests to model providers. Prior to 1.5.17, the isPublicIP function in core/providers/utils/fetch.go, reached through FetchAndEncodeURL for Bedrock and Vertex image or document URLs, classifies Carrier-Grade NAT 100.64.0.0/10, IPv6 6to4 2002::/16, NAT64 64:ff9b::/96 and 64:ff9b:1::/48, and deprecated IPv6 site-local fec0::/10 addresses as public. A remote attacker who controls a multimodal request URL can make the gateway fetch internal services, including a cloud instance metadata endpoint encoded through 6to4 or NAT64. This issue is fixed in version 1.5.17.

CVSS

No CVSS.

References

Link	Resource
https://github.com/maximhq/bifrost/commit/54ec431fc5255ff42c36420d88549477e0b33d89
https://github.com/maximhq/bifrost/pull/4092
https://github.com/maximhq/bifrost/releases/tag/core/v1.5.17
https://github.com/maximhq/bifrost/security/advisories/GHSA-w98g-5w9p-p3rc
https://github.com/maximhq/bifrost/security/advisories/GHSA-w98g-5w9p-p3rc

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 20:18

Updated : 2026-09-09 21:09

NVD link : CVE-2026-55245

Mitre link : CVE-2026-55245

CVE.ORG link : CVE-2026-55245

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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