CVE-2026-59109: Zalktis: SQL injection via partner-controlled fields in imported e-invoices

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-13 · updated 2026-10-24
Weakness: CWE-20

Description

SQL injection in the Zalktis accounting application via trading-partner-controlled text fields in received electronic invoices. When importing a received e-invoice (UBL/PEPPOL) or an e-commerce export, Zalktis concatenates partner-controlled values directly into SQL statement text using string concatenation, with neither parameterised queries nor escaping. The application's own escaping helper, Dazadi.sql_txt(), is not invoked on these code paths, so a party that sends an invoice can break out of the string literal and alter the query logic. This issue affects Zalktis: before 2026.1.586 and before 2026.2.592.

Affected products

Zalktis Programmas (SIA "Zalktis Programmas") Zalktis: before 2026.1.586; before 2026.2.592 — fixed in 2026.1.586, 2026.2.592

How to fix

Upgrade to a fixed version: Zalktis Programmas (SIA "Zalktis Programmas") Zalktis 2026.1.586, 2026.2.592. Check the vendor advisory for mitigations.

References

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