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CVE-2026-19078— Ose-oauth-server: oauth-server: open redirect vulnerability enables phishing via unvalidated parameter.

Quick assessment

Affected
Red Hat Red Hat OpenShift Container Platform 4
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.

OAuth是OAuth社区的一种授权协议。 OAuth存在输入验证错误漏洞，该漏洞源于授权批准处理器中的'then'参数未正确验证，可能导致远程攻击者构造恶意URL，当经过身份验证的用户批准或拒绝时，将其重定向至攻击者控制的网站，进而可能引发钓鱼攻击，诱导用户泄露敏感信息。

CVSS 4.3 · Medium EPSS 0.36% · P27

Possible ATT&CK Techniques 1 AI

T1566.001 · Spearphishing Attachment

Affected Version Matrix 2

VendorProduct Version RangeStatus
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-19078

Vulnerability Information
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Vulnerability Title
Ose-oauth-server: oauth-server: open redirect vulnerability enables phishing via unvalidated parameter.
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the oauth-server component. This open redirect vulnerability occurs when the 'then' parameter in the grant approval handler is not properly validated. A remote attacker can craft a malicious URL that, when approved or denied by an authenticated user, redirects them to an attacker-controlled website. This could enable phishing attacks, potentially tricking users into revealing sensitive information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
OAuth 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OAuth是OAuth社区的一种授权协议。 OAuth存在输入验证错误漏洞，该漏洞源于授权批准处理器中的'then'参数未正确验证，可能导致远程攻击者构造恶意URL，当经过身份验证的用户批准或拒绝时，将其重定向至攻击者控制的网站，进而可能引发钓鱼攻击，诱导用户泄露敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-19078

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III. Intelligence Information for CVE-2026-19078

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Vendor Advisories for CVE-2026-19078 (1)

Same Patch Batch · Red Hat · 2026-08-11 · 29 CVEs total

CVE-2026-10579 9.8 CRITICAL Picketlink-federation: auth bypass in picketlink saml unsolicited-response
CVE-2026-19546 8.8 HIGH Dbi: incomplete fix for cve-2026-14380 dbi: arbitrary code execution via caller-influenced
CVE-2026-15555 8.8 HIGH Jboss-marshalling-river: wildfly-clustering-infinispan-marshalling: jboss deserialization
CVE-2026-19550 8.2 HIGH Freeipa: ipa: freeipa: trust-fetch-domains uses trust-read aci to gate a privileged ad tru
CVE-2026-15556 8.1 HIGH Picketlink-federation: picketlink saml 2.0 auth bypass via missing assertions
CVE-2026-15560 8.1 HIGH Openjdk-orb: unauthed class loading via iiop in eap
CVE-2026-72693 7.8 HIGH Kbd: local privilege escalation in openvt via incorrect process owner verification allowin
CVE-2026-15565 7.5 HIGH Undertow: undertow-websockets: undertow: pre-auth dos on websocket endpoint with @serveren
CVE-2026-71467 7.5 HIGH Acm-search-v2-api-rhel9: search-v2-api: authentication bypass on /federated via upgrade: w
CVE-2026-71217 7.5 HIGH Iperf3: iperf3 server accepts unbounded peer-controlled json parameters enabling remote de
CVE-2026-15567 7.5 HIGH Wildfly: wildfly-iiop: wildfly-jacorb: wildfly: pre-auth denial of service on the iiop lis
CVE-2026-15562 7.5 HIGH Jboss-remoting: jboss-remoting: integer overflow in messagereader leads to pre-authenticat
CVE-2026-15561 7.5 HIGH Undertow-core: oom via missing limits in chunked trailer in eap's undertow
CVE-2026-15563 7.4 HIGH Wildfly-iiop-openjdk: missing authentication on eap's iiop nameservice leads to mitm or do
CVE-2026-15554 7.4 HIGH Undertow-core: undertow: authentication bypass via ajp ssl_cert/is_ssl forgery
CVE-2026-50237 7.4 HIGH Openshift/console: namespace tenant ssrf with egress bypass, catalog poisoning, and admin-
CVE-2026-50236 7.4 HIGH Openshift/console: authenticated ssrf with full response reflection and path neutralizatio
CVE-2026-72694 7.1 HIGH Mrtg: mrtg daemon symlink-following chown allows local privilege escalation via pid file p
CVE-2026-71474 7.1 HIGH Insights-client-rhel9: insights-client: pull-secret bearer token written to logs on non-20
CVE-2026-71475 6.8 MEDIUM Insights-client-rhel9: insights-client: spoke-controlled clusterid injected unencoded into

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Red Hat OpenShift Container Platform 4
Same vendor: Red Hat
Same weakness: CWE-601

V. Comments for CVE-2026-19078

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