CVE-2026-85958Network attack vectorHinoki check available

Unauthorized access via improper OAuth token acceptance

Published Oct 12, 2026 · Updated Oct 12, 2026

OAuth validation in Progress MarkLogic Server allows remote attackers to gain unauthorized access by presenting an unacceptable token. Its OAuth token validator accepts a token that the server should reject, but the public record does not identify the failed validation check. The issue affects the 11.x branch before 11.3.7 and the 12.x branch before 12.1.0 when OAuth authentication is configured; no data-disclosure or service-interruption capability is documented.

CVSS severity7.5
High
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OAuth validation in Progress MarkLogic Server allows remote attackers to gain unauthorized access by presenting an unacceptable token. Its OAuth token validator accepts a token that the server should reject, but the public record does not identify the failed validation check. The issue affects the 11.x branch before 11.3.7 and the 12.x branch before 12.1.0 when OAuth authentication is configured; no data-disclosure or service-interruption capability is documented.

The record

CVE
CVE-2026-85958
Published
Oct 12, 2026
Updated
Oct 12, 2026
Vendor
Progress Software Corporation
Product
MarkLogic Server
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.0.0 <11.3.7
  2. Affected versionversion=12.0.0 <12.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Progress Software Corporation · MarkLogic Serverversion=11.0.0 <11.3.7; version=12.0.0 <12.1.0

Published CVSS scores

7.5Progress Software CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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