CVE-2026-100834
http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0, 5.42.0.0 and 4.51.0.0 defaults the nonce
CVSS
5.9
Medium
EPSS
0.3%
p25
KEV
—
Exploit Today
7
0-100
Published: Sep 27, 2026 · Last modified: Sep 27, 2026 · CWE-294
0.3%EPSS · 30 days0.3%
2026-09-272026-10-25
http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0, 5.42.0.0 and 4.51.0.0 defaults the nonceVerifier parameter of ServerFilters.DigestAuth and DigestAuthProvider to { true }, so every nonce is accepted regardless of its value, age, or prior use. Applications relying on this default have no replay protection on Digest authentication: an attacker who can capture a valid 'Authorization: Digest' response (for example by observing network traffic or reading logs) can replay it indefinitely against the same protected resource.
- github.comhttps://github.com/http4k/http4k/commit/4f904b4692
- github.comhttps://github.com/http4k/http4k/commit/8a52b615b1
- github.comhttps://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h
- www.vulncheck.comhttps://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-658247.4 HIG16.6%
——5OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 2.2.1, an attacker who captures a pending invite token can replay it to obtain a passkey-registration credential and register their own passkey on the invited account, taking control of that account. For a staff or tenant-admin invite this yields access to the tenant context tied to that account. This issue has been patched in version 2.2.1.2dCVE-2026-1146174.2 MED14.0%
——4Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parse_id_token() reads the nonce_supported decision from the untrusted ID token being validated and sets the expected nonce to null when that claim is the JSON boolean false. In implicit and hybrid relying parties, or applications that directly accept externally supplied ID tokens, an attacker with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token into an attacker-controlled session. Plain authorization code flow is not affected, and the token must still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported in both authlib/integrations/base_client/sync_openid.py and authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in version 1.9.0.2dCVE-2026-87952—12.3%
——4Authentication Bypass by Capture-replay vulnerability in Drupal SAML SSO - Service Provider allows Remote Services with Stolen Credentials. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.4dCVE-2026-1033147.4 HIG33.1%
——10A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS). The Central SAML authentication ACS endpoint does not retain used SAML assertion or response identifiers to prevent replay. An attacker who obtains a valid, unexpired signed SAML response can submit it multiple times and receive distinct Central authentication tokens for the mapped identity.6dCVE-2026-1041056.4 MED18.3%
——6FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.23.0, FileRise verifies that a TOTP code is valid for the accepted time window but does not record that the same account and time step already succeeded. An attacker who has the target account's valid primary credential and captures a TOTP code after its successful use can replay that code from another pending-login session before the window closes. The issue does not by itself disclose the primary credential or TOTP code. This issue is fixed in version 3.23.0.10dCVE-2026-551674.2 MED10.6%
——3LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is processed. A user who has already completed valid password authentication can therefore retain the same signed WebAuthn ceremony state instead of consuming it once. The practical risk is limited by the requirement for a valid password, the same PHP session, and a valid authenticator signature. This issue is fixed in version 9.6.6d