CVE-2026-85965 Use-after-free in Progress MarkLogic Server JavaScript engine integration
Attackers can exploit a use-after-free flaw in the JavaScript engine to cause server instability, crashes, or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85965?
CVE-2026-85965 is a high-severity use after free vulnerability in Progress Software Corporation MarkLogic Server, published on 12 Oct 2026. An attacker needs administrator access to exploit it, 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 memory-safety defects in the JavaScript engine integration that could result in memory corruption, controlled process failure, or server instability.
Weakness: CWE-416
Which versions are affected by CVE-2026-85965?
How do I fix CVE-2026-85965?
No fix has been published for CVE-2026-85965 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-85965 being exploited?
There is no known exploitation of CVE-2026-85965 in the wild and no public exploit code.
Sources
Also known as GHSA-9mf9-3w9j-j23g.