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5451 vulnerabilities by RedHat

CVE-2026-11790 (GCVE-0-2026-11790)

Vulnerability from cvelistv5 – Published: 2026-06-09 13:09 – Updated: 2026-06-09 13:29
VLAI
Title
389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial of service
Summary
A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker who can modify a user's password hash can cause excessive CPU consumption during authentication, resulting in denial of service.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-11789 (GCVE-0-2026-11789)

Vulnerability from cvelistv5 – Published: 2026-06-09 13:02 – Updated: 2026-06-09 16:16
VLAI
Title
389-ds-base: 389-ds-base: smd5 password storage plugin salt length integer underflow crash
Summary
A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-11788 (GCVE-0-2026-11788)

Vulnerability from cvelistv5 – Published: 2026-06-09 13:02 – Updated: 2026-06-09 15:12
VLAI
Title
389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser
Summary
A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-11787 (GCVE-0-2026-11787)

Vulnerability from cvelistv5 – Published: 2026-06-09 13:02 – Updated: 2026-06-09 13:30
VLAI
Title
389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter parsing
Summary
A flaw was found in 389 Directory Server. The ldap_utf8prev() function reads bytes before the start of a buffer without bounds checking, causing a heap buffer over-read in string filter parsing that may influence internal filter processing behavior.
Severity
5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-11785 (GCVE-0-2026-11785)

Vulnerability from cvelistv5 – Published: 2026-06-09 12:57 – Updated: 2026-06-09 13:29
VLAI
Title
389-ds-base: 389-ds-base: partial stack address information leak via ber_printf type confusion in sso token handler
Summary
A flaw was found in 389 Directory Server. A type confusion in the SSO token extended operation handler causes partial stack address information to be disclosed in LDAP responses to authenticated users.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-11786 (GCVE-0-2026-11786)

Vulnerability from cvelistv5 – Published: 2026-06-09 12:57 – Updated: 2026-06-09 13:38
VLAI
Title
389-ds-base: 389-ds-base: heap out-of-bounds read in ldif parser str2entry_state_information_from_type()
Summary
A flaw was found in 389 Directory Server. The LDIF parser reads past the end of a heap buffer when processing attribute types with trailing semicolons during database import, causing an out-of-bounds read detectable under memory instrumentation.
Severity
1.9 (Low)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-04-16 00:00
Show details on NVD website
To clipboard 

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CVE-2026-50263 (GCVE-0-2026-50263)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-06-11 18:15
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50260 (GCVE-0-2026-50260)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50258 (GCVE-0-2026-50258)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb key types due to unchecked shift levels
Summary
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50259 (GCVE-0-2026-50259)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing
Summary
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. _XkbSetMapChecks() declares a fixed-size stack buffer mapWidths[256] indexed by key type index. The helper function CheckKeyTypes() writes to this buffer at a client-controlled offset, allowing a stack buffer overflow. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50256 (GCVE-0-2026-50256)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-06-10 13:34
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch
Summary
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias target name length is 1024 bytes. A font alias name between 257 and 1023 bytes causes the X server to copy that name into the undersized stack buffer without further checks. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-50257 (GCVE-0-2026-50257)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-06-10 03:58
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2026-1784 (GCVE-0-2026-1784)

Vulnerability from cvelistv5 – Published: 2026-06-02 07:22 – Updated: 2026-06-11 11:11
VLAI
Title
Ose-cluster-ingress-operator: remote code execution through haproxy configuration injection
Summary
The Route OpenShift resource allows to define routes to make pods reachable at a subdomain through HAProxy. It was found that the checks performed on the spec.path YAML stanza in a Route document was insufficient and could allow a controlled injection of the HAProxy configuration.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-15 - External Control of System or Configuration Setting
Assigner
References
URL Tags
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https://access.redhat.com/errata/RHSA-2026:23246 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-1784 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2436075 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat OpenShift Container Platform 4.19 Unaffected: 1780043338 , < * (rpm)
    cpe:/a:redhat:openshift:4.19::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.21 Unaffected: 1780444348 , < * (rpm)
    cpe:/a:redhat:openshift:4.21::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-06-02 07:12
Show details on NVD website
To clipboard 

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CVE-2026-10533 (GCVE-0-2026-10533)

Vulnerability from cvelistv5 – Published: 2026-06-01 13:19 – Updated: 2026-06-08 14:13
VLAI
Title
Openshift: openshift: non-admin user can bypass resourcequota and flood etcd with events causing cluster-wide api degradation
Summary
A flaw was found in OpenShift Container Platform. Completed pods with restartPolicy: Never do not count toward ResourceQuota pod limits, and Kubernetes events are not quota-scoped. A non-privileged user who can create pods in a namespace can exploit this to generate a large volume of events that accumulate in etcd, causing API server performance degradation across the cluster.
Severity
5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-10533 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2483727 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-03-16 09:43
Credits
Red Hat would like to thank Chris Sinclair for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-42965 (GCVE-0-2026-42965)

Vulnerability from cvelistv5 – Published: 2026-05-29 09:50 – Updated: 2026-06-08 14:59
VLAI
Title
Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation
Summary
A flaw was found in the OpenShift Router. A user with EndpointSlice write access can exploit this vulnerability by creating a Service backed by an FQDN (Fully Qualified Domain Name) EndpointSlice that resolves to a cloud metadata endpoint. This allows the router to proxy requests to the cloud metadata endpoint, leading to the disclosure of instance credentials and other sensitive metadata. This bypasses previous security measures for validating IP addresses.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-42965 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2483184 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-04-17 21:46
Credits
This issue was discovered by Ricardo Pchevuzinske Katz (Red Hat).
Show details on NVD website
To clipboard 

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CVE-2026-46579 (GCVE-0-2026-46579)

Vulnerability from cvelistv5 – Published: 2026-05-29 09:50 – Updated: 2026-06-08 14:59
VLAI
Title
Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
Summary
A flaw was found in the OpenShift Router. When a Route has `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend does not remove `X-SSL-Client-*` headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted `X-SSL-Client-*` headers. As a result, backends relying on these headers for mutual TLS (Transport Layer Security) authentication can be bypassed, enabling the attacker to impersonate client certificate identities.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
URL Tags
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https://bugzilla.redhat.com/show_bug.cgi?id=2483181 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-04-17 20:10
Credits
This issue was discovered by Ricardo Pchevuzinske Katz (Red Hat).
Show details on NVD website
To clipboard 

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CVE-2026-4408 (GCVE-0-2026-4408)

Vulnerability from cvelistv5 – Published: 2026-05-28 07:25 – Updated: 2026-06-10 15:31
VLAI
Title
Samba: remote code execution in samr
Summary
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:4.23.5-109.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.19.4-16.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/o:redhat:enterprise_linux:8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.23.5-10.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-05-26 00:00
Credits
Red Hat would like to thank John Walker (ZeroPath) and Ron Ben Yizhak (SafeBreach) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9802 (GCVE-0-2026-9802)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:47 – Updated: 2026-06-10 21:22
VLAI
Title
Keycloak: keycloak: unauthorized account access via replayed refresh tokens after cluster restart
Summary
A flaw was found in Keycloak. When revokeRefreshToken=true is enabled and persistent session storage is in use, a server restart can reset internal timing mechanisms. This allows a remote attacker, who has previously captured a user's refresh token, to replay that token even after it has been revoked. Successful exploitation grants the attacker unauthorized access to the victim's account, potentially leading to information disclosure or privilege escalation.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-613 - Insufficient Session Expiration
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9802 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482467 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 04:10
Credits
Red Hat would like to thank Gyeongpyo Son for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9803 (GCVE-0-2026-9803)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:47 – Updated: 2026-06-10 21:22
VLAI
Title
Keycloak: keycloak: denial of service via malformed authorization header
Summary
A flaw was found in Keycloak's ClientRegistrationAuth component. A remote unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with a malformed 'Authorization: Bearer' header to any client registration endpoint. This can lead to an ArrayIndexOutOfBoundsException, causing the server to return an HTTP 500 error and resulting in a Denial of Service (DoS) for the affected service.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9803 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482465 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 04:03
Credits
Red Hat would like to thank Mustafa Çetin for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9801 (GCVE-0-2026-9801)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:42 – Updated: 2026-06-10 21:22
VLAI
Title
Keycloak: keycloak: denial of service via malformed ldap password policy response
Summary
A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol (LDAP) server or an attacker compromising an upstream LDAP server, could exploit this vulnerability. By sending a malformed LDAP password policy response during a password authentication request, the attacker can trigger an OutOfMemoryError. This causes the Keycloak Java Virtual Machine (JVM) to terminate, leading to a denial of service (DoS) for all realms on the affected node.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9801 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482473 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 04:18
Credits
Red Hat would like to thank Seongkuk Park for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9798 (GCVE-0-2026-9798)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:37 – Updated: 2026-05-29 18:30
VLAI
Title
Keycloak: keycloak: brute-force protection bypass in ciba flow
Summary
A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication (CIBA) flow to bypass this brute-force protection. This allows continued authentication attempts and token issuance even when the account should be locked, potentially enabling further unauthorized access attempts.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-305 - Authentication Bypass by Primary Weakness
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-9798 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482470 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
 Create a notification for this product.
Date Public
2026-05-28 03:53
Credits
Red Hat would like to thank Evan Hendra (Independent Security Researcher) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9796 (GCVE-0-2026-9796)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:27 – Updated: 2026-05-28 12:16
VLAI
Title
Keycloak: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnerability
Summary
A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to `realm-admin` for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-9796 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482464 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
 Create a notification for this product.
Date Public
2026-05-28 03:32
Credits
Red Hat would like to thank Daniel Peters (Operating Intelligence Inc.), Lior Moshe (Operating Intelligence Inc.), and Uri Rolls (Operating Intelligence Inc.) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9795 (GCVE-0-2026-9795)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:49 – Updated: 2026-05-28 13:12
VLAI
Title
Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
Summary
A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-266 - Incorrect Privilege Assignment
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-9795 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482462 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
 Create a notification for this product.
Date Public
2026-05-28 03:16
Credits
Red Hat would like to thank Andrej Tomci for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9794 (GCVE-0-2026-9794)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:44 – Updated: 2026-06-10 21:22
VLAI
Title
Keycloak: keycloak: information disclosure via saml ecp endpoint
Summary
A flaw was found in Keycloak. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted SOAP requests to the SAML ECP (Security Assertion Markup Language Enhanced Client or Proxy) endpoint with varying client IDs. By observing distinct faultstrings in the responses, the attacker can determine the client's protocol type, leading to information disclosure.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9794 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482461 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 03:15
Credits
Red Hat would like to thank Asaad Mostafa and Muhammed Hussein for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9792 (GCVE-0-2026-9792)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:44 – Updated: 2026-06-10 21:21
VLAI
Title
Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition
Summary
A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9792 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482459 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 03:10
Credits
Red Hat would like to thank Evan Hendra (Independent Security Researcher) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9793 (GCVE-0-2026-9793)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:44 – Updated: 2026-05-30 01:53
VLAI
Title
Keycloak: keycloak: security policy bypass in jwe-encrypted request object processing
Summary
A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-9793 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482460 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
 Create a notification for this product.
Date Public
2026-05-28 03:12
Credits
Red Hat would like to thank Sree Gopinath (sreelim) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9791 (GCVE-0-2026-9791)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:27 – Updated: 2026-06-10 21:21
VLAI
Title
Keycloak-rhel9: organization data leak after feature disabled in keycloak
Summary
A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9791 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482458 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-28 03:08
Credits
Red Hat would like to thank Evan Hendra (Independent Security Researcher) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-9704 (GCVE-0-2026-9704)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-06-10 21:21
VLAI
Title
Keycloak: keycloak: privilege escalation due to oversized subject_token jwt
Summary
A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9704 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2481877 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
 Create a notification for this product.
Date Public
2026-05-27 12:45
Credits
Red Hat would like to thank Filip Jovanov (PegasusMKD) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-1933 (GCVE-0-2026-1933)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:28 – Updated: 2026-06-10 15:31
VLAI
Title
Samba: missing access check on reparse point operations
Summary
A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:4.23.5-109.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.23.5-10.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-05-27 12:08
Credits
Red Hat would like to thank Asim Viladi Oglu Manizada for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-2340 (GCVE-0-2026-2340)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:09 – Updated: 2026-06-10 15:50
VLAI
Title
Samba: vfs_worm does not block directory modification
Summary
A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:4.23.5-109.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.23.5-10.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2026-05-27 10:35
Credits
Red Hat would like to thank Pavel Kohout (Aisle Research) for reporting this issue.
Show details on NVD website
To clipboard 

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