CVE-2026-63221 CodeIgniter: SQL injection is possible via Query Builder deleteBatch() when used with where() conditions
Attackers can execute arbitrary SQL commands via the deleteBatch method in CodeIgniter, potentially reading or modifying database contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-63221?
CVE-2026-63221 is a critical SQL injection vulnerability in CodeIgniter4, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CodeIgniter is a PHP full-stack web framework. From 4.3.0 through 4.7.3, Query Builder deleteBatch() substitutes bound values from where() conditions into generated SQL while ignoring their escape flags, allowing user-controlled condition values to be interpreted as SQL. This affects only the deleteBatch() code path. Regular delete() operations escape where() binds correctly. This issue is fixed in version 4.7.4.
Weakness: CWE-89
Which versions are affected by CVE-2026-63221?
2 open source packages ship an affected version, including codeigniter4/framework.
| Package | Affected | Fixed in |
|---|---|---|
codeigniter4/framework Packagist | From 4.3.0 | 4.7.4 |
codeigniter4/framework Packagist | From 4.3.0 | 4.7.4 |
How do I fix CVE-2026-63221?
Upgrade codeigniter4/framework to 4.7.4 or later.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-63221 being exploited?
There is no known exploitation of CVE-2026-63221 in the wild and no public exploit code.
Sources
Also known as GHSA-c9w5-rwh3-7pm9, UBUNTU-CVE-2026-63221.