Axios: maxRedirects: 0 is not enforced by the fetch adapter, allowing redirect-based SSRF

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

Axios is a promise-based HTTP client for the browser and Node.js. From 1.17.0 until 1.20.0, the fetch adapter bypasses the maxRedirects: 0 redirect policy. An Axios request uses the fetch adapter with maxRedirects set to zero and receives a redirect response. The underlying fetch implementation follows the redirect instead of returning the redirect response unchanged. The redirected request can access internal responses or reach state-changing internal endpoints despite redirects being disabled. This issue is fixed in version 1.20.0.

[ Fixes ]Fixes and patches

• axios 1.20.0Fixed version · GitHub Advisories · npm package axios: upgrade to 1.20.0 or later (affected >= 1.17.0, < 1.20.0)

[ Advisories ]Government CERT advisories

• BSI CERT-Bund20 Oct 2026WID-SEC-2026-4056

  Atlassian products (Bamboo, Bitbucket, Confluence, Crucible, Fisheye and Jira): Multiple vulnerabilities Translated from German

  CVE-2026-13676CVE-2026-50750CVE-2026-53404+72 more CVEs
• CERT-FR16 Oct 2026CERTFR-2026-AVI-1336

  Multiple vulnerabilities in IBM products Translated from French

  Multiple vulnerabilities have been discovered in IBM products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-14671CVE-2026-11548CVE-2022-22950+490 more CVEs

[ Packages ]Affected open-source packages

• axios npmAffected >= 1.17.0, < 1.20.0 · fixed in 1.20.0 · GHSA-r4gj-5m52-g5wh

[ References ]References

• github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
• github.com/axios/axios/pull/11141
• github.com/axios/axios/releases/tag/v1.20.0
• github.com/axios/axios/security/advisories/GHSA-r4gj-5m52-g5wh