# CVE-2026-42044: node-axios: Axios is a promise based HTTP client for the browser and Node.js

CVE-2026-42044 is fixed in node-axios on 1 platform, first by node-axios 1.13.2+dfsg-1ubuntu0.1~esm1, released May 7, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-42044
- Priority: Urgent
- CVSS: 9.1 (critical)
- EPSS: 0.0062
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 24, 2026

## Description

Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.2, he 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 surgical, invisible modification of all JSON API responses — including privilege escalation, balance manipulation, and authorization bypass. The default transformResponse function at lib/defaults/index.js:124 calls JSON.parse(data, this.parseReviver), where this is the merged config object. Because parseReviver is not present in Axios defaults, not validated by assertOptions, and not subject to any constraints, a polluted Object.prototype.parseReviver function is called for every key-value pair in every JSON response, allowing the attacker to selectively modify individual values while leaving the rest of the response intact. This vulnerability is fixed in 1.15.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-axios Debian 14 | 1.15.2-1 | [DEBIAN-CVE-2026-42044](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42044.md) | May 15, 2026 |
| Linux | node-axios Ubuntu 26.04.1 LTS (resolute) | 1.13.2+dfsg-1ubuntu0.1~esm1 | [node-axios 1.13.2+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-node-axios-1.13.2-dfsg-1ubuntu0.1-esm1.md) | May 7, 2026 |

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Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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