# CVE-2026-42740: Tainacan SQL injection in WordPress plugin

Source: https://junglewise.ai/threats/cve-2026-42740-tainacan-sql-injection-in-wordpress-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-27. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2026-42740 · Severity: critical · CVSS 9.3 · Published 2026-05-27

Tainacan, a digital repository platform for WordPress, contains a security flaw that could allow an attacker to interfere with its database. By exploiting this vulnerability, an unauthorized individual could potentially steal sensitive information, modify data, or disrupt the service entirely. This poses a significant risk to the integrity and confidentiality of the digital collections managed by the software.

Technologies: [Tainacan](https://junglewise.ai/threats/technologies/tainacan). Vendors: [Tainacan](https://junglewise.ai/threats/vendors/tainacan).

## Quick answers

**Is CVE-2026-42740 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42740 being exploited in the wild.

**How severe is CVE-2026-42740?** Critical severity, with a CVSS score of 9.3, published 27 May 2026.

**Which products and versions are affected?** Tainacan <= 1.0.3.

**Is there a fix for CVE-2026-42740?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-42740 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-42740?** Check whether you run Tainacan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Blind SQL Injection vulnerability exists in the Tainacan plugin for WordPress due to improper neutralization of special elements used in SQL commands. The flaw allows a remote, unauthenticated attacker to send crafted requests to the application and infer data from the database based on the server's response patterns. This can lead to full database compromise, including the extraction of sensitive user credentials or administrative session tokens. The vulnerability is present in versions up to 1.0.3; users are advised to check for updates from the vendor.

## Affected products

- Tainacan Tainacan <= 1.0.3

## Timeline

- 2026-05-27: advisory: Vulnerability published by NVD

## References

- [https://patchstack.com/database/Wordpress/Plugin/tainacan/vulnerability/wordpress-tainacan-plugin-1-0-3-sql-injection-vulnerability?_s_id=cve](https://patchstack.com/database/Wordpress/Plugin/tainacan/vulnerability/wordpress-tainacan-plugin-1-0-3-sql-injection-vulnerability?_s_id=cve)

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