CVE-2026-54148

http4k: `DigestAuthProvider.verify` did not bind to request URI

HIGH
8.1
CVSS Score
Published: September 18, 2026 at 04:09 PM UTC
Updated: September 24, 2026 at 09:37 PM UTC
1 product affected across 1 vendorHTTP4K

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Severity
HIGH8.1
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.51.0.0v < 5.42.0.0v < 6.50.0.0
Affected range stops below 4.51.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.42.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.50.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-294

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