CVE-2026-73331 Overview
CVE-2026-73331 is an authenticated SQL injection vulnerability in CamaleonCMS 2.9.1. The flaw resides in the post slug field, which is passed to the database backend without adequate parameterization. Authenticated users with post creation or editing privileges can submit crafted slug values that the SQLite backend evaluates as SQL syntax. Attackers can leverage boolean-based or union-based blind SQL injection techniques to extract sensitive data from application tables, including administrative credentials and configuration values. The issue is tracked under [CWE-89] and documented in the VulnCheck Advisory.
Critical Impact
Authenticated attackers can extract administrative credentials and sensitive configuration data from the underlying SQLite database, enabling full application compromise.
Affected Products
- CamaleonCMS 2.9.1
- Deployments using the SQLite database backend
- Instances allowing untrusted or low-privileged authors post creation or editing rights
Discovery Timeline
- 2026-08-12 - CVE-2026-73331 published to NVD
- 2026-08-12 - Last updated in NVD database
Technical Details for CVE-2026-73331
Vulnerability Analysis
CamaleonCMS 2.9.1 processes the post slug field through a database query that fails to properly parameterize user-supplied input. Any authenticated account with post creation or editing rights can submit a slug containing SQL syntax. The SQLite backend evaluates the injected fragment as part of the query, breaking the intended query structure.
Attackers can use boolean-based blind techniques to infer database contents one bit at a time. Union-based payloads allow direct extraction of arbitrary column values in query responses. Both techniques target application tables containing administrative password hashes, session data, and configuration values.
The vulnerability requires authentication but no elevated privileges, meaning any low-privileged author or contributor account can exploit it. Successful exploitation exposes credentials that can be cracked offline or reused to escalate to administrative access.
Root Cause
The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The slug parameter is concatenated or interpolated into a query string rather than bound as a parameter. Standard ORM query-building safeguards are bypassed for this specific input path, exposing the raw SQL surface to attacker-controlled content.
Attack Vector
The attack is delivered over the network through the standard post creation or editing workflow. An authenticated user submits a post with a malicious slug value crafted to alter the underlying SQL query. No user interaction beyond the attacker's own session is required. Full technical details are available in the VulnCheck Advisory and the Camaleon CMS repository.
Detection Methods for CVE-2026-73331
Indicators of Compromise
- Post records with slug values containing SQL keywords such as UNION, SELECT, SLEEP, CASE WHEN, or quote characters and comment markers (--, /*).
- Application or database error logs referencing malformed SQL originating from post creation or update endpoints.
- Unexpected SELECT queries against user credential or configuration tables initiated during post save operations.
- Repeated failed post-save requests from a single authenticated session, consistent with blind SQL injection iteration.
Detection Strategies
- Inspect web server access logs for POST requests to post creation and edit endpoints containing encoded SQL syntax in the slug parameter.
- Enable SQL query logging on the SQLite backend and alert on queries deviating from expected slug-lookup patterns.
- Correlate authenticated user sessions producing high volumes of post save requests with database error rates.
Monitoring Recommendations
- Establish baseline query patterns for CamaleonCMS post operations and alert on deviations.
- Monitor read access to sensitive tables holding user credentials and application settings.
- Track authenticated accounts creating or editing posts at abnormal frequencies or with anomalous payload sizes.
How to Mitigate CVE-2026-73331
Immediate Actions Required
- Restrict post creation and editing privileges to trusted accounts only until a patched release is applied.
- Rotate administrative credentials and any secrets stored in application configuration tables if exploitation is suspected.
- Review audit logs for suspicious slug values or unusual database access patterns since the CamaleonCMS 2.9.1 deployment date.
- Place the application behind a web application firewall configured to block SQL injection payloads in slug parameters.
Patch Information
No fixed version is listed in the referenced advisories at the time of publication. Monitor the Camaleon CMS GitHub repository and the VulnCheck Advisory for updated releases addressing the slug field parameterization issue.
Workarounds
- Apply input validation at the application or reverse-proxy layer to reject slug values containing SQL metacharacters.
- Reduce the attack surface by disabling self-registration and requiring administrative approval for new author accounts.
- Isolate the CamaleonCMS database from other application data to limit the impact of credential extraction.
# Example WAF rule to block SQL syntax in slug parameter (ModSecurity)
SecRule ARGS:post[slug] "@rx (?i)(union\s+select|sleep\(|case\s+when|--|/\*)" \
"id:1002026,phase:2,deny,status:403,msg:'Potential SQLi in CamaleonCMS slug (CVE-2026-73331)'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
