CVE-2026-104462
Deferred Deferred - Pending Action

SQL Injection in YesWiki via Bazar nuagetag Action

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: VulnCheck

Description
YesWiki before 4.6.7 contains an SQL injection vulnerability in the Bazar nuagetag action, which concatenates the unescaped tags attribute into a raw SQL IN clause. Attackers with page-write access (unauthenticated on default installs) can embed a nuagetag tag ending in a backslash to break quote parity and inject a UNION subquery, exfiltrating password hashes and arbitrary table data.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-104462
EUVD
EUVD-2026-91473

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
yeswiki yeswiki to 4.6.7 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

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Executive Summary

YesWiki before version 4.6.7 has an SQL injection flaw in the Bazar nuagetag action. The tags parameter is directly inserted into a raw SQL IN clause without escaping. Attackers with page-write access can exploit this by using a backslash to break quote parity and inject a UNION subquery. This allows them to steal password hashes and extract arbitrary data from database tables.

Detection Guidance

To detect this vulnerability, check if your YesWiki instance is running a version before 4.6.7. Inspect the Bazar nuagetag action for SQL injection patterns, particularly in the tags parameter handling. Look for UNION-based queries or backslash-escaped inputs in logs.

Impact Analysis

If you use YesWiki versions before 4.6.7, attackers with page-write access may steal sensitive data like password hashes. On default installations, unauthenticated users can exploit this remotely. The attacker could also access other database tables, potentially exposing confidential information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection. Organizations may face legal penalties, reputational damage, and loss of compliance certifications if exploited.

Mitigation Strategies

Immediately upgrade YesWiki to version 4.6.7 or later. If upgrading is not possible, disable the Bazar nuagetag action or restrict page-write permissions to authenticated users only. Apply input validation and parameterized queries to sanitize the tags parameter.

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