Security readout for executives and security teams
Plain-English summary
CVE-2026-7504 is an open redirect flaw in Red Hat build of Keycloak. It matters when clients allow wildcard redirect URIs. A user can be tricked into following a crafted login or redirect flow that sends them to an unauthorized URL, increasing phishing and sensitive-information exposure risk.
Executive priority
Treat this as a high-priority identity-platform configuration and patching issue. It is not reported as actively exploited in the provided sources, but affected SSO systems can amplify phishing and credential-risk scenarios across many applications.
Technical view
Keycloak redirect validation can disagree with Java URI parsing when a URL contains malformed user-info with multiple @ characters. In affected wildcard redirect configurations, Keycloak may fall back to wildcard matching and allow a redirect it should reject. The issue is classified as CWE-601 with CVSS 8.1.
Likely exposure
Exposure appears limited to Red Hat build of Keycloak 26.2 and 26.4 deployments using affected packages and clients configured with wildcard (*) Valid Redirect URIs. Deployments without wildcard client redirects are less likely to be exposed based on the provided description.
Exploitation context
The source bundle says exploitation requires user interaction. KEV is false, and no cited source in the bundle states active exploitation. The main risk is redirect abuse that supports phishing, token or information exposure, or follow-on attacks within trusted authentication flows.
Researcher notes
Focus validation on the intersection of affected Red Hat build of Keycloak versions and wildcard redirect URI client configuration. Evidence in the bundle is sufficient for exposure triage, but operational fix details should be confirmed against the linked Red Hat advisories.
Mitigation direction
- Apply the relevant Red Hat advisories or vendor-recommended updates.
- Replace wildcard Valid Redirect URIs with explicit allowed redirect URLs.
- Audit Keycloak clients for unnecessary wildcard redirect configuration.
- Prioritize internet-facing identity providers and high-value client applications.
- Monitor authentication logs for unexpected redirect destinations.
Validation and detection
- Inventory Red Hat build of Keycloak 26.2 and 26.4 deployments.
- Check installed packages against the affected and unaffected versions listed by Red Hat.
- Review every client for wildcard (*) Valid Redirect URIs.
- Confirm redirects only resolve to explicitly intended application URLs.
- Review recent auth events for unusual redirect_uri values or unauthorized destinations.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-601: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-7504 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N2.85.2redhatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N2.85.2redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- ADP timelineredhat-SADP
Reported to Red Hat.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- Source timelineredhat
Made public.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-04-30T14:46:59.812Z: Reported to Red Hat.
- 2026-05-19T10:52:12.777Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:19594CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:19595CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:19596CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:19597CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-7504CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2464128CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7504.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
URL Redirection to Untrusted Site ('Open Redirect')
URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.