What happened
A security vulnerability in the widely used Axios JavaScript library has been disclosed that can lead to prototype pollution when applications process untrusted input. According to the report, the flaw resides in how Axios handles specific object assignments involving deeply nested values, enabling an attacker to craft inputs that mutate an object’s prototype. Prototype pollution can cause unexpected behavior in applications that rely on object inheritance, potentially leading to logic errors, data manipulation, or security control bypasses depending on how affected code consumes the polluted objects. The vulnerability affects Axios versions prior to the patched release, and maintainers have issued updates to address the issue. Developers and organizations were urged to update dependencies and audit affected systems to remove reliance on vulnerable Axios versions.
Who is affected
Applications and services built on JavaScript and Node.js that depend on vulnerable versions of the Axios library are affected, as prototype pollution can be triggered when untrusted input is improperly handled by the affected code paths.
Why CISOs should care
Flaws in popular application dependencies like Axios can introduce systemic risk across web applications and APIs, where prototype pollution may undermine integrity checks, data validation, or security logic when translated into runtime behavior.
3 practical actions
- Update Axios dependency. Upgrade to the patched Axios release that resolves the prototype pollution flaw.
- Audit dependency usage. Identify applications and services using affected Axios versions and remediate them.
- Review input handling. Ensure untrusted user input is validated and sanitized before being passed into object assignments.