CVE-2026-37982

mediumpriority · track · 0OT risk · elevatedEPSS 0.004 · 38 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.44% (38th) EPSS

CVSS 6.8 · medium

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secalert@redhat.com USexploitability 1.6 · impact 5.2

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · OSV

v3.16.2mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-294USCWE-294US

affected products (8)

Products and version ranges known to be affected.

Open Source Keycloak <26.6.2all versionscert_bundDE
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Open Source Keycloak< 26.6.2cert_bundDE
Red Hat Red Hat build of Keycloak 26.4< 26.4-17enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.4< 26.4.12-1enisa_euvdEU
redhat build of keycloak26.4 → 26.4.12nvdUScpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*
Bitnami keycloak26.4.0 → 26.4.12osvUSpkg:bitnami/keycloak
Maven org.keycloak:keycloak-services< 26.6.2osvUSpkg:maven/org.keycloak/keycloak-services

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1612Keycloak: Mehrere SchwachstellenDeutsch2026-05-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Informationen offenzulegen, Daten zu manipulieren, Sicherheitsvorkehrungen zu umgehen und einen Denial of Service zu verursachen.
GHSA-w4p5-rfh6-cwrvKeycloak: Unauthorized account takeover via WebAuthn token replay2026-05-19ghsa · osvUS
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.
BIT-keycloak-2026-37982Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay2026-08-25vendor · osvUS
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2026-05-19modified 2026-10-26

references (10)

External citations — patches, advisories, analysis.

scry

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