CVE-2026-53527
Authenticated users can escalate to admin via the user-update API.
Is CVE-2026-53527 being exploited?
Not confirmed. CVE-2026-53527 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 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-53527?
CVE-2026-53527 is rated High with a CVSS score of 8.8. 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-2026-53527?
Yes. A fix has been recorded for CVE-2026-53527. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53527 affect?
CVE-2026-53527 affects LeafWiki 0.1.0 - 0.10.0, Self-hosted LeafWiki instances. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53527?
Upgrade to LeafWiki 0.10.1+, restrict account creation, and limit access to the user-update API.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can change their role via the user-update API to obtain admin privileges and full control of the instance.
Immediate action required
- affected>= 0.1.0 and < 0.10.1
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.