CVE-2026-59109
SQL injection in Zalktis via partner-controlled e-invoice fields.
Is CVE-2026-59109 being exploited?
Not confirmed. CVE-2026-59109 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-2026-59109?
CVE-2026-59109 is rated High with a CVSS score of 8.7. 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-2026-59109?
Yes. A fix has been recorded for CVE-2026-59109. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-59109 affect?
CVE-2026-59109 affects Zalktis accounting application <2026.1.586, Zalktis accounting application <2026.2.592. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59109?
Update to 2026.1.586 or 2026.2.592+ and validate/whitelist invoice sources.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker supplying crafted e-invoices can inject SQL to read/modify/exfiltrate or delete accounting DB records and alter queries.
Immediate action required
- affected< 2026.1.586
- affected< 2026.2.592
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.