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CVE-2026-44494 high CVSS 8.7

Vulnerability in axios (CVE-2026-44494)

Summary

Vulnerability in axios (CVE-2026-44494). Confidential information can be exposed externally. Exploitable via Authorization header. Mitigation: upgrade to 1.15.0 or later.

Original description

The description as published by the source.

Vulnerability Disclosure: Full Man-in-the-Middle via Prototype Pollution Gadget in config.proxy

Summary

The Axios library is vulnerable to a Prototype Pollution "Gadget" attack that allows any Object.prototype pollution in the application's dependency tree to be escalated into a full Man-in-the-Middle (MITM) attack — intercepting, reading, and modifying all HTTP traffic including authentication credentials.

The HTTP adapter at lib/adapters/http.js:670 reads config.proxy via standard property access, which traverses the prototype chain. Because proxy is not present in Axios defaults, the merged config object has no own proxy property, making it trivially injectable via prototype pollution. Once injected, setProxy() routes all HTTP requests through the attacker's proxy server.

Unlike the transformResponse gadget (which is constrained by assertOptions to return true), the proxy gadget has zero constraints — the attacker gets a full MITM position with the ability to read all credentials and tamper with all responses.

Severity: Critical (CVSS 9.4)
Affected Versions: All versions (v0.x - v1.x including v1.15.0)
Vulnerable Component: lib/adapters/http.js (config property access on merged object)

CWE

  • CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
  • CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')

CVSS 3.1

Score: 9.4 (Critical)

Vector:…

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-44494 has been found in axios.
Attackers can target a specific entry point like Authorization header over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.7/10.
What to do: upgrade axios to 1.15.0 or later.
If unsure, ask your IT team or search "axios CVE-2026-44494" on the vendor's site.

CVE-2026-44494 (axios) — CWE-441 / CVSS v3 8.7
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Authorization header / config.proxy / Object.prototype / proxy
Patched: 1.15.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-441) exists in axios. Attackers reach the vulnerable code path via Authorization header without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of axios. Attack surface: Authorization header / config.proxy / Object.prototype / proxy.

🔥 Severity

Severity: High (CVSS 8.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 1.15.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'axios' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'axios' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で axios を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade axios to 1.15.0

    ステージング環境で 1.15.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

npm axios
[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.16.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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