CVE-2026-18363
osTicket password-reset token bug allows token reuse and account takeover.
Is CVE-2026-18363 being exploited?
Not confirmed. CVE-2026-18363 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 0.30% probability of exploitation in the next 30 days.
How severe is CVE-2026-18363?
CVE-2026-18363 is rated Critical with a CVSS score of 9.1. 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-2026-18363?
Yes. A fix has been recorded for CVE-2026-18363. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-18363 affect?
CVE-2026-18363 affects osTicket versions prior to v1.17.8, osTicket versions prior to v1.18.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-18363?
Upgrade to v1.17.8/v1.18.4; invalidate reset tokens; force password resets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
An attacker with a valid reset token can reuse it to reset passwords and take over user accounts (unauthorized remote account compromise).
Immediate action required
- affected< 1.17.8
- affected< 1.18.4
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.