CVE-2026-85976 HTTP response splitting in Progress MarkLogic Server Query Console
Attackers can perform HTTP response splitting via the Query Console file-exploration endpoint, potentially manipulating client-side response handling.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-85976?
CVE-2026-85976 is a medium-severity vulnerability in Progress Software Corporation MarkLogic Server, published on 12 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 do not sufficiently sanitize input used by the Query Console file-exploration endpoint, which could allow HTTP response splitting and unintended client-side response handling.
Weakness: CWE-113
Which versions are affected by CVE-2026-85976?
How do I fix CVE-2026-85976?
No fix has been published for CVE-2026-85976 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85976 being exploited?
There is no known exploitation of CVE-2026-85976 in the wild and no public exploit code.
Sources
Also known as GHSA-h279-5w49-h4vj.