REDHAT-BUG-2466684: High severity fast-uri vulnerability

Published May 5, 2026
·
Updated

fast-uri normalize() decoded percent-encoded authority delimiters inside the host component and then re-emitted them as raw delimiters during serialization. A host that combined an allowed domain, an encoded at-sign, and a different domain was re-emitted with the at-sign as a raw userinfo separator, changing the URI's authority to the second domain. Applications that normalize untrusted URLs before host allowlist checks, redirect validation, or outbound request routing can be steered to a different authority than the input appeared to specify. Versions <= 3.1.1 are affected. Update to 3.1.2 or later.

Affected Software

1 affected component
fast-uri<=3.1.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade fast-uri to a version that resolves this vulnerability.

    Fixed in 3.1.2

Event History

May 5, 2026
Data Sourced
via Red Hat·11:01 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2466684?

The severity of REDHAT-BUG-2466684 is classified as high, with a score of 7.

2

How do I fix REDHAT-BUG-2466684?

To fix REDHAT-BUG-2466684, update the fast-uri software to the latest patched version.

3

What software is affected by REDHAT-BUG-2466684?

The vulnerability REDHAT-BUG-2466684 affects the fast-uri software.

4

What is the risk associated with REDHAT-BUG-2466684?

REDHAT-BUG-2466684 presents a risk level of 33, indicating a potential for significant impact.

5

What issue does REDHAT-BUG-2466684 address?

REDHAT-BUG-2466684 addresses the improper handling of percent-encoded authority delimiters in the normalization process.

Contact

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