---
title: "CVE-2026-54148: http4k - Authentication Bypass"
description: "http4k < 4.51.0.0, < 5.42.0.0, and < 6.50.0.0 contain an authentication bypass caused by DigestAuthProvider.verify not comparing the uri parameter with the actual request URL, letting attackers replay valid Digest responses to gain unauthorized access, exploit requires capturing a valid Digest authentication response."
url: https://panop.io/threat-heartbeat/CVE-2026-54148/
---

# CVE-2026-54148 http4k - Authentication Bypass

http4k < 4.51.0.0, < 5.42.0.0, and < 6.50.0.0 contain an authentication bypass caused by DigestAuthProvider.verify not comparing the uri parameter with the actual request URL, letting attackers replay valid Digest responses to gain unauthorized access, exploit requires capturing a valid Digest authentication response.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.58% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-54148)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Data Tampering, Information Disclosure

CVSS vector

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

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-294](https://cwe.mitre.org/data/definitions/294.html)

## Vendor fix

Upgrade to versions 4.51.0.0, 5.42.0.0, or 6.50.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-54148](https://nvd.nist.gov/vuln/detail/CVE-2026-54148)
- [https://github.com/github/advisory-database/pull/9477](https://github.com/github/advisory-database/pull/9477)
- [https://github.com/http4k/http4k/commit/725f1b96978dd433348e2b149c1e72b9f5147c90](https://github.com/http4k/http4k/commit/725f1b96978dd433348e2b149c1e72b9f5147c90)
- [https://github.com/http4k/http4k/releases/tag/6.50.0.0](https://github.com/http4k/http4k/releases/tag/6.50.0.0)
- [https://github.com/http4k/http4k/security/advisories/GHSA-p28p-j94q-pg32](https://github.com/http4k/http4k/security/advisories/GHSA-p28p-j94q-pg32)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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