What is GHSA-x2p4-rxj5-99w6?

GHSA-x2p4-rxj5-99w6 is a security advisory published by GitHub Security Advisories with Critical severity. When using an *ambient user* in a first transfer doing Negotiate authentication and asked to...

Which CVE IDs does GHSA-x2p4-rxj5-99w6 cover?

GHSA-x2p4-rxj5-99w6 covers the following CVE IDs: CVE-2026-86413. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x2p4-rxj5-99w6?

GHSA-x2p4-rxj5-99w6 has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-x2p4-rxj5-99w6CriticalCVSS 9.1

When using an ambient user in a first transfer doing Negotiate authentication and asked to...

Vendor

GitHub Security Advisories

Published

October 20, 2026

Last Modified

October 30, 2026

🔗 CVE IDs covered (1)

CVE-2026-86413 →

📋 Description

When using an ambient user in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect there.

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-86413
https://hackerone.com/reports/3993549
https://curl.se/docs/CVE-2026-86413.html
https://curl.se/docs/CVE-2026-86413.json
https://github.com/advisories/GHSA-x2p4-rxj5-99w6