CVE-2026-18211Disclosure(redhat / build_of_keycloak)

LOWCVSS 5.4 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redirect URIs. Due to an improper check that only looks at the start of a web address rather than properly verifying the host, an attacker can bypass these security restrictions by using a specially crafted domain name. This could allow an attacker to intercept sensitive authentication codes over unencrypted connections.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-20

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • build_of_keycloak

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
Products
build_of_keycloak

1 version affected across 1 product

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-31: 2Technical Details · 2026-07-31: 107-31
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • CVE@CVEnew
    General

    CVE-2026-18211 A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on … https://www.cve.org/CVERecord?id=CVE-2026-18211

    Post summary

    The text briefly notes the discovery of a flaw in the Keycloak secure-client-uris executor but provides no detailed technical info, PoC, exploit, or patch details.

    00001994
    57.9K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-18211 A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on … https://www.cve.org/CVERecord?id=CVE-2026-18211 ----- Traducción: Se encontró una fa… http://infoflow.cloud`

    Post summary

    The post announces the discovery of a flaw in Keycloak’s secure‑client‑uris policy executor, providing limited technical context but no evidence of exploitation, patches, or PoC.

    0000036
    96 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appredhatbuild_of_keycloak---

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