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High, CVSS 7.1

QuantumNous/new-api has an SSRF Filter Bypass via 0.0.0.0

CVE-2026-42339GHSA-v5c3-6wvc-pc2q

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go github.com/QuantumNous/new-api

    Affected
    <= 0.11.9-alpha.1
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
7.1 · 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 · score source
EPSS
  • CVE-2026-42339: 0.26% estimated exploitation activity in the next 30 days; percentile 17.53 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

SSRF Filter Bypass via 0.0.0.0 Summary 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. Details Root Cause common/ssrfprotection.go — isPrivateIP() (lines 33–47) checks the following ranges: - 10.0.0.0/8 - 172.16.0.0/12 - 192.168.0.0/16 - 127.0.0.0/8 - 169.254.0.0/16 - 224.0.0.0/4 - 240.0.0.0/4 0.0.0.0/8 is not checked. On Linux, 0.0.0.0 resolves to the local machine, same as 127.0.0.1. Default Fetch Settings…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-v5c3-6wvc-pc2q

Agent brief

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# Patch Next advisory brief: CVE-2026-42339

Advisory: QuantumNous/new-api has an SSRF Filter Bypass via 0.0.0.0
IDs: CVE-2026-42339, GHSA-v5c3-6wvc-pc2q
Record: https://patchnext.com/advisories/cve-2026-42339 (revision 1, source checked 26 Oct 2026, 15:20 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/QuantumNous/new-api: affected <= 0.11.9-alpha.1

## Suggested inspection (read-only)
- Go github.com/QuantumNous/new-api: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/QuantumNous/new-api.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-v5c3-6wvc-pc2q (GitHub-reviewed advisory GHSA-v5c3-6wvc-pc2q lists affected ranges: Go github.com/QuantumNous/new-api >=0 <=0.11.9-alpha.1)

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