CVE-2026-85958 Improper OAuth token validation in Progress MarkLogic Server
Attackers can bypass authentication using invalid OAuth tokens to gain unauthorized access to MarkLogic Server data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85958?
CVE-2026-85958 is a high-severity authentication bypass vulnerability in Progress Software Corporation MarkLogic Server, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 contain an authentication validation weakness that could allow an attacker to use a token that should not be accepted by the affected server, which could result in unauthorized access.
Weakness: CWE-287
Which versions are affected by CVE-2026-85958?
How do I fix CVE-2026-85958?
No fix has been published for CVE-2026-85958 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-85958 being exploited?
There is no known exploitation of CVE-2026-85958 in the wild and no public exploit code.
Sources
Also known as GHSA-72m4-2fjg-4pqx.