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CVE-2026-91926

Gss-ntlmssp: gss-ntlmssp: memory leak in ntlm_decode_target_info via duplicated av_pair entries in ntlm challenge

A flaw was found in gss-ntlmssp. A memory leak occurs in the NTLM target-info parser when a crafted NTLM CHALLENGE message contains duplicated string-valued AV_PAIR entries. The parser allocates memory for each string value but does not free the previous allocation when the same AV_PAIR type appears more than once, leaking the earlier allocation. A malicious or man-in-the-middle server can exploit this to cause gradual memory exhaustion on the client during NTLM authentication, leading to a denial of service.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Enterprise Linux Enterprise Linux
CVE-2026-79705

Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers

A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Enterprise Linux Red Hat Quay 3 Ansible Automation Platform and 12 more
CVE-2026-79699

Podman: buildah: skopeo: containers/storage: malicious tar whiteout header allows replacement of extraction destination directory

A flaw was found in the containers/storage library. A crafted tar archive containing a malicious whiteout header (e.g. victim/.wh.) can cause the extraction destination directory to be replaced with an arbitrary file when processed by storage/pkg/archive.UnpackLayer, ApplyLayer, or ApplyUncompressedLayer.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Enterprise Linux Red Hat Quay 3 Ansible Automation Platform and 12 more
CVE-2026-92358

Keycloak-services: keycloak-services: residual cross-browser account-link proof allows silent re-linking

A flaw was found in the first broker login flow of Keycloak. When a user confirms an account-linking request from a different browser, a temporary proof is created to validate the link. However, this proof is not properly cleared after the link is established or when the user later manually removes the link. An attacker who controls the external identity can exploit this leftover proof to silently re-establish the link and gain unauthorized access to the victims account without any further confirmation.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-94001

Keycloak-services: keycloak-services: admin credential delete bypasses denied reset-password permission

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The endpoint used for deleting user credentials does not correctly check for fine-grained reset-password permissions. This allows a delegated administrator, who should be restricted from resetting passwords, to delete a user's password credentials, resulting in the user being unable to log in.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-94213

Keycloak-services: keycloak-services: authorization services policy evaluation endpoint leaks user identity

A flaw was found in the Authorization Services component of Keycloak, an open-source identity and access management solution. The issue occurs in the policy evaluation endpoint, which is used by administrators to test how access policies apply to specific users. Due to missing authorization checks, a delegated administrator with limited viewing privileges can access the full profile and role information of any user in the realm, even if they are not permitted to view user details. This could lead to the exposure of sensitive information such as email addresses and assigned security roles.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-94215

Keycloak-services: keycloak-services: cross-realm client read/write via request-level cache missing realm ownership check

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the request path. This allows an administrator with limited privileges to read or modify sensitive client configurations in the master realm by accessing them through a realm they control. Successful exploitation could lead to the exposure of client credentials or the redirection of administrative login attempts to malicious sites.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-94217

Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision

A flaw was found in the User-Managed Access (UMA) implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one user requests an authorization token. This allows an attacker to gain access scopes on a victim's resource that were never intended to be shared.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-94218

Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication session restart endpoint

A flaw was found in the authentication session management of Keycloak, an identity and access management solution. The issue occurs when an administrator enforces a stronger authentication flow, such as mandatory two-factor authentication (2FA) setup, through a client policy. A user can bypass this requirement by manually visiting a specific session restart web link during the login process. This action clears the internal markers that track the required security steps, allowing the user to log in with only a password and gain access without completing the mandated 2FA setup.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Red Hat Build Of Keycloak 26.4 Build Keycloak Build Of Keycloak and 2 more
CVE-2026-92382

Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads to heap out-of-bounds write

An out-of-bounds write flaw was found in usbredir. Starting an isochronous OUT stream with a transfer count of 1 leaves the stream's single transfer buffer permanently unsubmitted, defeating the bounds check in usbredirhost_iso_packet() and allowing a usbredir peer to write past the end of the packet descriptor array on every subsequent isochronous packet.

CVSS 3.1 · 4.1 Medium EPSS < 1% KEV · Not listed
Vendors
Red Hat Redhat
Products
Enterprise Linux Enterprise Linux Rhel Els
CVE-2026-102474

Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation

A flaw was found in dash. The printf builtin reserves four bytes before converting a Unicode \u or \U escape, but the multi-byte token can need five or six bytes. A local user who can supply such an escape to dash printf or echo %b, including through dash -c and a positional argument, can write one or two bytes past that reservation.

CVSS 3.1 · 4 Medium EPSS < 1% KEV · Not listed
Vendors
Dash Red Hat Redhat
Products
Dash Enterprise Linux Enterprise Linux and 1 more
CVE-2026-62146

Cri-o: cri-o: sandbox state poisoning via pod annotations may expose runtime socket

A trust-boundary flaw in CRI-O's sandbox state persistence allows attacker-influenced pod metadata to overwrite CRI-O's own reserved sandbox bookkeeping; once reloaded as trusted after a restart, a later container recreate in that sandbox can expose a host-side runtime-management resource inside the container, enabling container escape.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Openshift Openshift Container Platform
CVE-2026-4897

Polkit: polkit: denial of service via unbounded input processing through standard input

A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Freedesktop Redhat
Products
Polkit Enterprise Linux Hummingbird and 3 more
CVE-2026-124882

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Rhel Eus
CVE-2026-124881

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Rhel Eus
CVE-2026-124876

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Rhel Eus
CVE-2026-18103

Dhcp-server: dhcp-server: persistent denial of service due to buffer overflow via omapi

A flaw was found in dhcp-server. A remote attacker with network access to the OMAPI (Open Management Application Programming Interface) port, especially if not secured with TSIG (Transaction Signature) key authentication, could send a specially crafted lease creation request. This request, containing an overly long InfiniBand MAC address, triggers a buffer overflow in the `print_hw_addr()` function. Successful exploitation leads to a persistent denial of service (DoS), causing the `dhcpd` service to crash and preventing it from restarting without manual intervention.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Vendors
Dhcp-server Redhat
Products
Dhcp-server Enterprise Linux Rhel Els
CVE-2026-16530

Pcp: pcp: remote denial of service and information leakage

A flaw was found in the PCP (Performance Co-Pilot) `pmproxy` service. A remote attacker can exploit a vulnerability in the `pmLogLoadInDom()` function by sending a specially crafted request. This bypasses a critical bounds check, which can lead to the `pmproxy` service crashing, causing a Denial of Service (DoS). Additionally, this flaw may enable the leakage of sensitive information from the system's memory.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Openshift Openshift Container Platform and 1 more
CVE-2026-111497

Out-of-Bounds Write in Google Brotli Decoder

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

CVSS 4.0 · 9.2 Critical EPSS 82.6% KEV · Listed
Vendors
7-zip Andybalholm Anthropic and 14 more
Products
P7zip Brotli Bun and 61 more