CVE-2026-42339 PUBLISHED

New API: SSRF Filter Bypass via 0.0.0.0

Assigner: GitHub_M
Reserved: 26.04.2026 Published: 08.05.2026 Updated: 08.05.2026

New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. In versions 0.11.9-alpha.1 and prior, the SSRF protection introduced in v0.9.0.5 (CVE-2025-59146) and hardened in v0.9.6 (CVE-2025-62155) does not block the unspecified address 0.0.0.0. A regular (non-admin) user holding any valid API token can send a multimodal request to /v1/chat/completions, /v1/responses, or /v1/messages with 0.0.0.0 as the image/file URL host, bypassing the private-IP filter and causing the server to issue HTTP requests to localhost. This constitutes at minimum a blind SSRF; when the request is routed through an AWS/Bedrock Claude adaptor, the fetched content is inlined into the model response, upgrading it to a full-read SSRF. At time of publication, there are no publicly available patches.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.1

Product Status

Vendor QuantumNous
Product new-api
Versions
  • Version <= 0.11.9-alpha.1 is affected

References

Problem Types

  • CWE-918: Server-Side Request Forgery (SSRF) CWE