CVE-2026-23899
Improper access check allows unauthorized access to webservice endpoints.
Is CVE-2026-23899 being exploited?
Not confirmed. CVE-2026-23899 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 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-23899?
CVE-2026-23899 is rated High with a CVSS score of 8.6. 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-2026-23899?
Yes. A fix has been recorded for CVE-2026-23899. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What should I do about CVE-2026-23899?
Patch when available; enforce proper access checks and ACL reviews.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthorized access to protected webservice endpoints could expose data or allow actions without authentication.
Immediate action required
- affected4.0.0-5.4.3
- affected6.0.0-6.0.3
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.