---
id: CVE-2026-7557
title: >-
  An improper verification of cryptographic signature vulnerability in the SAML
  authentication module of Progress MarkLogic Server before 11.3.6 and 12.0.3
  allows an unauthenticated remote attacker to bypass authentication and
  impersonate …
summary: >-
  An improper verification of cryptographic signature vulnerability in the SAML
  authentication module of Progress MarkLogic Server before 11.3.6 and 12.0.3
  allows an unauthenticated remote attacker to bypass authentication and
  impersonate …
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-347
published: '2026-08-05'
updated: '2026-08-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-7557'
references:
  - url: >-
      https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-August-2026
    label: security@progress.com
tags:
  - nvd
epss: 0.00462
epssPercentile: 0.37347
ingestedAt: '2026-08-29T16:39:13.947Z'
---

## Overview

An improper verification of cryptographic signature vulnerability in the SAML authentication module of Progress MarkLogic Server before 11.3.6 and 12.0.3 allows an unauthenticated remote attacker to bypass authentication and impersonate any user, including administrators. This vulnerability affects deployments with SAML single sign-on enabled.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.