CVE-2026-8709
Authenticated low-priv REST role can escalate privileges via MarkLogic REST API document patch.
Is CVE-2026-8709 being exploited?
Not confirmed. CVE-2026-8709 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-8709?
CVE-2026-8709 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-8709?
Yes. A fix has been recorded for CVE-2026-8709. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-8709 affect?
CVE-2026-8709 affects Progress MarkLogic Server < 11.3.6, Progress MarkLogic Server < 12.0.3, MarkLogic REST API document patch operation. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-8709?
Upgrade to 11.3.6 or 12.0.3; restrict REST API access and audit accounts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated low-privileged REST user can escalate privileges to perform privileged operations on the Security database (modify accounts/permissions, create admin access).
Immediate action required
- affected>= 11.0.0 and < 11.3.6
- affected>= 12.0.0 and < 12.0.3
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.