---
id: "CVE-2026-107413"
page: "https://infrastack.ai/live/CVE-2026-107413"
kind: "vulnerability"
aliases: ["CVE-2026-107413"]
title: "Citrix NetScaler: SAML authentication memory overflow enables denial of service"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "NetScaler ADC", "fixed": ["14.1-73.57", "13.1-64.39", "14.1-FIPS 14.1-73.58", "13.1-FIPS 13.1-37.293"], "affected": "unknown", "ecosystem": "vendor"}, {"name": "NetScaler Gateway", "fixed": ["14.1-73.57", "13.1-64.39"], "affected": "unknown", "ecosystem": "vendor"}]
ecosystems: []
tags: ["citrix-netscaler", "infrastructure", "netscaler-adc", "netscaler-gateway", "saml", "self-hosted"]
not_affected_if: ["no-saml-action", "no-saml-auth"]
published_at: "2026-11-13T03:17:28+00:00"
first_seen_at: "2026-11-13T03:42:55+00:00"
updated_at: "2026-11-13T03:44:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107413", "first_seen_at": "2026-11-13T03:42:55+00:00"}, {"source": "analyst", "url": "https://support.citrix.com/external/article/CTX697305", "first_seen_at": "2026-11-13T03:44:49+00:00", "cites": ["https://support.citrix.com/external/article/CTX697305"]}]
exploit_sources: []
---

# Citrix NetScaler: SAML authentication memory overflow enables denial of service

Link for people: https://infrastack.ai/live/CVE-2026-107413 (this .md is for agents)

A memory overflow in SAML authentication in Citrix NetScaler ADC and NetScaler Gateway can cause unpredictable or erroneous behavior. The flaw can be used to cause a denial of service against the appliance.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:NetScaler ADC affected unknown fixed 14.1-73.57, 13.1-64.39, 14.1-FIPS 14.1-73.58, 13.1-FIPS 13.1-37.293
- vendor:NetScaler Gateway affected unknown fixed 14.1-73.57, 13.1-64.39

## How to check

Exposed only if the appliance is configured with a SAML action (Citrix precondition). On the appliance, look for 'add authentication samlAction' in the running config (show running | grep samlAction). Then compare the firmware (show version) with the fixed builds: 14.1-73.57, 13.1-64.39, 14.1-FIPS 14.1-73.58, 13.1-FIPS/NDcPP 13.1-37.293. The bulletin as read does not give the first affected build; treat anything older than the fixed build as unpatched until Citrix says otherwise.

## Fix

Update to NetScaler ADC/Gateway 14.1-73.57 or later, 13.1-64.39 or later 13.1, 14.1-FIPS 14.1-73.58 FIPS or later, or 13.1-FIPS/13.1-NDcPP 13.1-37.293 or later.

## Timeline

- 2026-11-13T03:42:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-107413
- 2026-11-13T03:44:49+00:00 analyst https://support.citrix.com/external/article/CTX697305 — Read Citrix bulletin CTX697305: precondition is SAML action, heap overflow CWE-122, DoS, fixed builds listed. Affected lower bound not stated; no exploitation or PoC seen. Exa/X searches not run for discussion.

## Documents

- [advisory] Citrix NetScaler ADC and Gateway Security Bulletin (CTX697305) https://support.citrix.com/external/article/CTX697305

## From the sources

Memory overflow in SAML authentication can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_