CVE-2026-42740Public exploitNetwork attack vector

Unauthenticated database disclosure via unsanitized status parameter

Published May 27, 2026 · Updated May 27, 2026

Blind SQL injection in Tainacan 1.0.3 and earlier allows remote attackers to read WordPress database contents through public REST endpoints. The REST controller accepts an unsanitized status value, maps it to post_status, and embeds the resulting WP_Query text into another SQL statement. No account or user interaction is required when a site exposes a public collection; crafted status values can disclose database data and cause limited availability loss.

CVSS severity9.3
Critical
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Blind SQL injection in Tainacan 1.0.3 and earlier allows remote attackers to read WordPress database contents through public REST endpoints. The REST controller accepts an unsanitized status value, maps it to post_status, and embeds the resulting WP_Query text into another SQL statement. No account or user interaction is required when a site exposes a public collection; crafted status values can disclose database data and cause limited availability loss.

The record

CVE
CVE-2026-42740
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Tainacan
Product
Tainacan
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.0.3 changes=[{"at":"1.1.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tainacan · Tainacanversion=0 <=1.0.3 changes=[{"at":"1.1.0","status":"unaffected"}]

Published CVSS scores

9.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo