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CVE-2026-94265

9.1 · CRITICAL

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.

Published Oct 20, 2026CWE-200EPSS 0.78%

Overview

CVE-2026-94265 is a critical-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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`.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcurl.se/docs/CVE-2026-94265.htmlRefcurl.se/docs/CVE-2026-94265.jsonRefhackerone.com/reports/4040551Refhackerone.com/reports/4040551

How CyberStrike helps

Frequently asked questions

What is CVE-2026-94265?

CVE-2026-94265 is a critical-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-94265?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-94265?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-94265?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-94265 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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