Prototype pollution in axios - CVE-2026-101908
Published: September 17, 2026 / Updated: September 29, 2026
Vulnerability identifier: #VU150719
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101908
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to alter outbound requests.
The vulnerability exists due to improper handling of inherited properties in the Axios fetch adapter when invoking fetch with the original fetchOptions after creating a Request. A remote attacker can cause inherited fetchOptions values to override request options to alter outbound requests.
Exploitation requires a prior same-process prototype-pollution primitive.
Affected software
axios
How to mitigate CVE-2026-101908
Install security update from vendor's website.
axios - update to 1.20.0