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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-54148http4k: `DigestAuthProvider.verify` did not bind to request URI

High 8.1

In plain English

A high-severity security flaw in http4k from http4k. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.6%top 52.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

http4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest does not compare the uri parameter in an Authorization: Digest response with the actual request URL. An attacker who captures a valid Digest authentication response can replay it against another URL served by the same realm, bypassing the per-request-URI binding and potentially gaining unauthorized read or write access. This issue is fixed in versions 4.51.0.0, 5.42.0.0, and 6.50.0.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.http4k:http4k-security-digest6.50.0.0GHSA-p28p-j94q-pg32
Mavenorg.http4k:http4k-security-digest5.42.0.0GHSA-p28p-j94q-pg32
Mavenorg.http4k:http4k-security-digest4.51.0.0GHSA-p28p-j94q-pg32

Affected products (as reported)

VendorProductVersions
http4k http4k < 4.51.0.0>= 5.0.0.0, < 5.42.0.0>= 6.0.0.0, < 6.50.0.0

Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References