Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-97846— Keycloak-services: keycloak-services: standard token exchange v2 bypasses mtls holder-of-key binding

Quick assessment

Affected
Red Hat Red Hat Build of Keycloak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak 提供了一个称为 mTLS holder-of-key 绑定的功能，该功能通过将令牌与客户端的数字证书绑定，确保令牌只能由最初请求该令牌的客户端使用。然而，研究人员发现一个缺陷：新的标准令牌交换 V2（Standard Token Exchange V2）功能未进行此证书检查。这导致攻击者利用窃取的客户端凭据，可以获取一个标准的、不受限制的令牌，从而绕过上述安全保护机制。

CVSS 6.8 · Medium EPSS 0.14% · P2
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-97846

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Keycloak-services: keycloak-services: standard token exchange v2 bypasses mtls holder-of-key binding
Source: CVE Program / CVE List V5
Vulnerability Description
Keycloak provides a feature called mTLS holder-of-key binding which ensures that a token can only be used by the client that originally requested it by binding it to their digital certificate. A flaw was discovered where the new Standard Token Exchange V2 feature does not check for this certificate. This allows an attacker with stolen client credentials to obtain a standard, unrestricted token that bypasses these security protections.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-97846

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-97846

请登录查看更多情报信息。

Other References for CVE-2026-97846 (2)

Same Patch Batch · Red Hat · 2026-09-25 · 3 CVEs total

CVE-2026-93834 8.8 HIGH Qemu-kvm: 9pfs: use-after-free race in tlcreate/twalk allows vm guest escape
CVE-2026-96448 6.6 MEDIUM Keycloak-services: keycloak-services: fgap v2 composite-blind role mapping allows privileg

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-287

V. Comments for CVE-2026-97846

No comments yet

Leave a comment