# Axios: Header Injection via Inherited headers After Minimal Interceptor

Advisory record · `GHSA-j8rh-479h-cp32`

- **Identifiers:** `GHSA-j8rh-479h-cp32` · `CVE-2026-101904`
- **State:** Confirmed
- **Severity:** CVSS 6.9 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-74](https://cwe.mitre.org/data/definitions/74.html) · [CWE-1321](https://cwe.mitre.org/data/definitions/1321.html)
- **Tags:** [Other injection](https://agentprime.io/advisories/tag/injection.md) · [Prototype pollution](https://agentprime.io/advisories/tag/prototype-pollution.md)
- **Published:** 30 Sept 2026
- **Updated:** 30 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Sept 2026, 15:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `axios` (npm): affected `>=1.0.0, <1.20.0`; fixed in `1.20.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 16 Sept 2026, 09:04 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/axios/axios/security/advisories/GHSA-j8rh-479h-cp32)
- 31 Oct 2026, 13:34 UTC: First seen by agentprime
- 31 Oct 2026, 13:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-j8rh-479h-cp32)

## Sources

- [GitHub Advisory Database: GHSA-j8rh-479h-cp32](https://github.com/advisories/GHSA-j8rh-479h-cp32)
- [OSV: GHSA-j8rh-479h-cp32](https://osv.dev/vulnerability/GHSA-j8rh-479h-cp32)
- <https://github.com/axios/axios/security/advisories/GHSA-j8rh-479h-cp32>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-101904>
- <https://github.com/axios/axios/pull/11141>
- <https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a>
- <https://github.com/axios/axios>
- <https://github.com/axios/axios/releases/tag/v1.20.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-j8rh-479h-cp32>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-j8rh-479h-cp32/>. Everything for agents: <https://agentprime.io/llms.txt>.