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Server-side request forgery in Portkey AI Gateway

Priority MEDIUM 64CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Portkey AI Gateway 1.14.0 through 1.15.2 contains a server-side request forgery flaw (CWE-918). The isValidCustomHost check trusts localhost-style hosts when TRUSTED_CUSTOM_HOSTS is unset. An unauthenticated remote attacker can make the gateway call loopback and Docker host services and return their responses. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Portkey AI Gateway 1.14.0 through 1.15.2 contains a server-side request forgery vulnerability that allows unauthenticated attackers to reach loopback and Docker host services because isValidCustomHost trusts localhost-style hosts when TRUSTED_CUSTOM_HOSTS is unset. Attackers can send /v1 requests with a crafted x-portkey-custom-host header, such as via the ollama provider, to make the gateway call internal services and return their responses.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Portkey-AIgateway1.14.0 – 1.15.2—No fix listedCNA
  • gateway VendorPortkey-AI Affected 1.14.0 – 1.15.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Portkey AI Gateway.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110719
  2. 2026-10-15 Alias added: GHSA-h36v-27jx-93r3
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Priority changed: LOW → MEDIUM

References

  • TI-2026-56735 Portkey AI Gateway Server-Side Request Forgery via /v1/proxy/* CVSS 4.0HIGH 8.7

Sources