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PatchSiren cyber security CVE debrief

CVE-2026-44489 axios CVE debrief

Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads proxy.username, proxy.password, and proxy.auth without hasOwnProperty checks. When Object.prototype.username is polluted, setProxy() constructs a Proxy-Authorization header with attacker-controlled credentials and injects it into every proxied HTTP request. This vulnerability is fixed in 1.16.0.

Vendor
axios
Product
Unknown
CVSS
LOW 3.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-15
Advisory published
2026-06-11
Advisory updated
2026-06-15

Who should care

Users of Axios from version 1.15.2 to before 1.16.0

Technical summary

The vulnerability arises from the utils.merge() function creating nested objects with Object.prototype in their chain. The setProxy() function then reads properties from these objects without proper checks, allowing for potential prototype pollution attacks.

Defensive priority

LOW

Recommended defensive actions

  • Update Axios to version 1.16.0 or later

Evidence notes

The vulnerability is fixed in Axios version 1.16.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44489 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44489

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44489 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44489

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.