Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| maximhq | bifrost | < 1.5.17 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | SUSE-SU-2026:23712-1, SUSE-SU-2026:23692-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | SUSE-SU-2026:23712-1, SUSE-SU-2026:23692-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | openSUSE-SU-2026:21812-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/maximhq/bifrost/core | < 1.5.17 | 1.5.17 | GHSA-w98g-5w9p-p3rc |
Advisories 3
- SUSE-SU-2026:23692-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:23712-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:21812-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 10, 2026