CVE-2026-42339
New API: SSRF Filter Bypass via 0.0.0.0
Description
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.
INFO
Published Date :
May 8, 2026, 11:16 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update the LLM gateway to a patched version.
- Verify SSRF protection blocks 0.0.0.0.
- Restrict API access to authorized users.
- Monitor network requests for suspicious activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42339.
| URL | Resource |
|---|---|
| https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q | Exploit Mitigation Vendor Advisory |
| https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42339 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42339
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42339 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42339 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: new-api de QuantumNous, Description: Nueva API es una pasarela de modelo de lenguaje grande (LLM) y un sistema de gestión de activos de inteligencia artificial (IA). En las versiones 0.11.9-alpha.1 y anteriores, la protección SSRF introducida en la v0.9.0.5 (CVE-2025-59146) y reforzada en la v0.9.6 (CVE-2025-62155) no bloquea la dirección no especificada 0.0.0.0. Un usuario regular (no administrador) que posea cualquier token de API válido puede enviar una solicitud multimodal a /v1/chat/completions, /v1/responses o /v1/messages con 0.0.0.0 como host de la URL de imagen/archivo, eludiendo el filtro de IP privada y haciendo que el servidor emita solicitudes HTTP a localhost. Esto constituye, como mínimo, un SSRF ciego; cuando la solicitud se enruta a través de un adaptador AWS/Bedrock Claude, el contenido recuperado se inserta en línea en la respuesta del modelo, elevándolo a un SSRF de lectura completa. En el momento de la publicación, no hay parches disponibles públicamente. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'QuantumNous', 'product': 'new-api', 'versions': [{'status': 'affected', 'version': '<= 0.11.9-alpha.1'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-42339', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-11T15:56:42.403641Z'} -
Initial Analysis by [email protected]
May. 18, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:newapi:new_api:0.11.9:alpha1:*:*:*:*:*:* *cpe:2.3:a:newapi:new_api:*:*:*:*:*:*:*:* versions up to (excluding) 0.11.9 Added Reference Type CISA-ADP: https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 11, 2026
Action Type Old Value New Value Added Reference https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q -
New CVE Received by [email protected]
May. 08, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-918 Added Reference https://github.com/QuantumNous/new-api/security/advisories/GHSA-v5c3-6wvc-pc2q