Prototype pollution in axios - #VU136912
Published: July 6, 2026
Vulnerability identifier: #VU136912
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: axios
Affected software:
axios
axios
Detailed vulnerability description
The vulnerability allows a remote user to alter request semantics.
The vulnerability exists due to improperly controlled modification of object prototype attributes in bodyless method aliases in lib/core/Axios.js when processing requests after Object.prototype has already been polluted. A remote user can pollute Object.prototype.data to alter request semantics.
Exploitation requires chaining with a separate prototype pollution condition in the same process.
Remediation
Install security update from vendor's website.