HTTP response splitting in axios - #VU125749
Published: April 10, 2026
Vulnerability identifier: #VU125749
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: axios
Affected software:
axios
axios
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code or compromise cloud resources.
The vulnerability exists due to improper neutralization of CRLF sequences in HTTP headers in lib/adapters/http.js when merging polluted header properties into outbound requests. A remote attacker can pollute Object.prototype through another vulnerable dependency and trigger a crafted request smuggling chain to execute arbitrary code or compromise cloud resources.
Exploitation requires chaining with a prototype pollution vulnerability in another dependency and can bypass AWS IMDSv2 protections to obtain metadata service tokens.
Remediation
Install security update from vendor's website.