Critical severity · published Aug 5, 2026
CVE-2026-7557
SAML authentication bypass in Progress MarkLogic Server
9.1
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
MarkLogic Server · Progress Software Corporation
11.0.0 before 11.3.6; 12.0.0 before 12.0.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7557
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7557
Vendor Advisory
https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-August-2026
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