CVE-2026-85969 Out-of-bounds write in Progress MarkLogic Server
A remote authenticated attacker can trigger an out-of-bounds write in MarkLogic Server, causing instability or limited data modification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85969?
CVE-2026-85969 is a high-severity memory corruption vulnerability in Progress Software Corporation MarkLogic Server, published on 12 Oct 2026. Any signed-in user can exploit it over the network, 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 out-of-bounds write vulnerability in certain language-processing functionality. A remote authenticated attacker could exploit this vulnerability to cause server instability or limited modification of data.
Weakness: CWE-787
Which versions are affected by CVE-2026-85969?
How do I fix CVE-2026-85969?
No fix has been published for CVE-2026-85969 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-85969 being exploited?
There is no known exploitation of CVE-2026-85969 in the wild and no public exploit code.
Sources
Also known as GHSA-cc5x-mg69-6h54.