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New Api CVE-2026-25802

HIGH
Cross-site Scripting (XSS) (CWE-79)
2026-02-24 security-advisories@github.com GHSA-299v-8pq9-5gjq
7.6
CVSS 3.1 · GitHub Advisory
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate to New API platform
  2. Exploit
    Submit prompt generating model output with script tags
  3. Execution
    MarkdownRenderer.jsx renders unescaped HTML
  4. Impact
    XSS payload executes in victim browser

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Authenticated user access required to New API platform (PR:L). Victim must view rendered markdown output containing model-generated content with <script> tags in MarkdownRenderer.jsx component (versions prior to 0.10.8-alpha.9). User interaction required to view malicious output.

Impact

CVSS 7.6 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: Required. Public exploit/POC available.

Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

New API LLM gateway versions before 0.10.8-alpha.9 are vulnerable to stored cross-site scripting through the MarkdownRenderer component, which fails to sanitize script tags in model outputs. An authenticated attacker with user interaction can inject malicious scripts that execute in other users' browsers, potentially compromising session data or performing unauthorized actions. Public exploit code exists for this vulnerability, though a patch is available.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:55 CVSS 7.6

New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. [CVSS 7.6 HIGH]

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

Affected Packages

go github.com/quantumnous/new-api fix: 0.10.8-alpha.9

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in go

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects New Api. New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to version 0.10.8-alpha.9, a potential unsafe operation occurs in component MarkdownRenderer.jsx, allowing for Cross-Site Scripting(XSS) when the model outputs items containing <script> tag. Version 0.10.8-alpha.9 fixes the issue.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 7.6 HIGH
AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L
SUSE HIGH

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
High
Availability
Low

Lifecycle Timeline

3
PoC Detected
Feb 25, 2026 - 20:17 vuln.today
Public exploit code
Patch released
Feb 25, 2026 - 20:17 nvd
Patch available
CVE Published
Feb 24, 2026 - 01:16 nvd
HIGH 7.6

DescriptionGitHub Advisory

New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to version 0.10.8-alpha.9, a potential unsafe operation occurs in component MarkdownRenderer.jsx, allowing for Cross-Site Scripting(XSS) when the model outputs items containing <script> tag. Version 0.10.8-alpha.9 fixes the issue.

Executive ViewAI

Why It Matters

A HIGH severity vulnerability (CVE-2026-25802) affecting our LLM gateway and AI asset management system has been publicly disclosed with available exploits. This vulnerability could allow attackers to compromise our AI infrastructure and access sensitive data processed through these systems, requiring immediate patching to prevent potential data breaches and service disruption.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.0%
Top 92% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

58
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:newapi:new_api:*:*:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha1:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha2:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha3:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha4:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha5:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha6:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha7:*:*:*:*:*:*
cpe:2.3:a:newapi:new_api:0.10.8:alpha8:*:*:*:*:*:*

Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Leap 15.6 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP5 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6 Fixed
openSUSE Leap 15.5 Fixed

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