CVE-2026-94265

critical · 9.1

When processing an HTTP redirect to a URL containing userinfo (a `username:password` component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of `--location-trusted`.

9.1

CVSS

0.3%

EPSS (exploit prob.)

27th

EPSS percentile

2026-10-20

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-200

References

https://curl.se/docs/CVE-2026-94265.html
https://curl.se/docs/CVE-2026-94265.json
https://hackerone.com/reports/4040551
https://hackerone.com/reports/4040551

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-94265