CVE-2026-59109
Zalktis: SQL injection via partner-controlled fields in imported e-invoices
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.
INFO
Published Date :
Aug. 13, 2026, 5:17 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
Yes !
Source :
a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
Affected Products
The following products are affected by CVE-2026-59109
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | ||||
| CVSS 4.0 | HIGH | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 | ||||
| CVSS 4.0 | HIGH | a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 |
Solution
- Update Zalktis to version 2026.1.586 or later.
- Update Zalktis to version 2026.2.592 or later.
- Ensure all partner-controlled values are properly sanitized.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59109.
| URL | Resource |
|---|---|
| https://cvd.cert.lv/disclosed/vuln-all-631428755 | |
| https://offseq.com/en/research/zalktis-cve-2026-59109 | |
| https://offseq.com/en/research/zalktis-cve-2026-59109/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59109 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59109
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59109 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59109 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: Zalktis Programmas (SIA “Zalktis Programmas”), Description: Inyección SQL en la aplicación de contabilidad Zalktis a través de campos de texto controlados por el socio comercial en facturas electrónicas recibidas. Al importar una factura electrónica recibida (UBL/PEPPOL) o una exportación de comercio electrónico, Zalktis concatena valores controlados por el socio directamente en el texto de la sentencia SQL utilizando concatenación de cadenas, sin consultas parametrizadas ni escape. El propio ayudante de escape de la aplicación, Dazadi.sql_txt(), no se invoca en estas rutas de código, por lo que una parte que envía una factura puede salir del literal de cadena y alterar la lógica de la consulta. Este problema afecta a Zalktis: antes de 2026.1.586 y antes de 2026.2.592. Title: Zalktis Programmas (SIA “Zalktis Programmas”), Description: Inyección SQL en la aplicación de contabilidad Zalktis a través de campos de texto controlados por el socio comercial en facturas electrónicas recibidas. Al importar una factura electrónica recibida (UBL/PEPPOL) o una exportación de comercio electrónico, Zalktis concatena valores controlados por el socio directamente en el texto de la sentencia SQL utilizando concatenación de cadenas, sin consultas parametrizadas ni escape. El propio ayudante de escape de la aplicación, Dazadi.sql_txt(), no se invoca en estas rutas de código, por lo que una parte que envía una factura puede salir del literal de cadena y alterar la lógica de la consulta. Este problema afecta a Zalktis: antes de 2026.1.586 y antes de 2026.2.592. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: Zalktis Programmas (SIA “Zalktis Programmas”), Description: Inyección SQL en la aplicación de contabilidad Zalktis a través de campos de texto controlados por el socio comercial en facturas electrónicas recibidas. Al importar una factura electrónica recibida (UBL/PEPPOL) o una exportación de comercio electrónico, Zalktis concatena valores controlados por el socio directamente en el texto de la sentencia SQL utilizando concatenación de cadenas, sin consultas parametrizadas ni escape. El propio ayudante de escape de la aplicación, Dazadi.sql_txt(), no se invoca en estas rutas de código, por lo que una parte que envía una factura puede salir del literal de cadena y alterar la lógica de la consulta. Este problema afecta a Zalktis: antes de 2026.1.586 y antes de 2026.2.592. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 14, 2026
Action Type Old Value New Value Added Reference https://offseq.com/en/research/zalktis-cve-2026-59109/ Added SSVC {'id': 'CVE-2026-59109', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-14T17:46:01.133135Z'} -
New CVE Received by a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Zalktis Programmas (SIA "Zalktis Programmas")', 'product': 'Zalktis', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2026.1.586', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '2026.2.592', 'versionType': 'semver'}], 'platforms': ['Windows'], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-20 Added CWE CWE-89 Added Reference https://cvd.cert.lv/disclosed/vuln-all-631428755 Added Reference https://offseq.com/en/research/zalktis-cve-2026-59109