HTTP response splitting in axios - #VU125749
Published: April 10, 2026
Vulnerability identifier: #VU125749
CSH Severity: High
CVSS v4: 9.3 [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]
CVE-ID: N/A
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
axios
Remediation
Install security update from vendor's website.
axios - update to 1.15.0