CVE-2026-5163

Missing authorization check in AI message rewrite endpoint allows access to private thread content

Mattermost versions 11.5.x <= 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite endpoint.. Mattermost Advisory ID: MMSA-2026-00645

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-6339

Missing request origin validation on burn-on-read reveal endpoint

Mattermost versions 11.5.x <= 11.5.1, 11.4.x <= 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost Advisory ID: MMSA-2026-00636

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-6343

Mattermost Playbooks Plugin fails to enforce view permissions in list endpoints, allowing unauthorized access to public playbooks

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check public/private permissions which allows members without these permissions to access public playbooks via /get.. Mattermost Advisory ID: MMSA-2026-00591

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-6345

Prevent password disclosure and force reset during Slack import

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-40020

dovecot: dovecot: Denial of Service via IMAP SETACL command injection

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

Vendors

Dovecot Open-xchange

Products

Dovecot Dovecot Ox Dovecot Pro

CVE-2021-47971

My Notes Safe 5.3 Denial of Service via Buffer Overflow

My Notes Safe 5.3 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

My-notes-safe

Products

My Notes Safe

CVE-2021-47954

LayerBB 1.1.4 SQL Injection via search_query Parameter

LayerBB 1.1.4 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries by injecting SQL code through the search_query parameter. Attackers can send POST requests to /search.php with malicious search_query values using CASE WHEN statements to extract sensitive database information.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Layerbb

Products

Layerbb

CVE-2026-41553

Remote Code Execution in PDF Export Module

PDF Export Module used in DHTMLX's products Gantt and Scheduler is vulnerable to Remote Code Execution due to lack of "data" parameter sanitization. An unauthenticated attacker can inject the malicious JavaScript code to the parameter whose value is processed by Node.js and subsequently executed. This can lead to server compromise. This issue was fixed in PDF Export Module version 0.7.6.

CVSS 4.0 · 10 Critical EPSS < 1% KEV · Not listed

Vendors

Dhtmlx

Products

Pdf Export Module

CVE-2026-6346

Sensitive credentials exposed in plaintext in Mattermost support packets

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields before including them in support packet generation, which allows a Mattermost System Admin or any party with access to a support packet to obtain sensitive credentials in plaintext via downloading a support packet from the System Console.. Mattermost Advisory ID: MMSA-2026-00607

CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-6347

Mattermost Calls plugin exposes TURN server credentials in plaintext in support packets

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields in the Mattermost Calls plugin which allows an attacker with access to a support packet to obtain TURN server credentials via the plaintext values present in the exported plugin configuration.. Mattermost Advisory ID: MMSA-2026-00605

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-4054

SVG content served through Mattermost image proxy despite Content-Type restrictions causes client-side denial of service

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 Fail to validate the response body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served from an attacker-controlled origin under a non-SVG Content-Type header (e.g. image/png) embedded in an og:image meta tag or Markdown image link.. Mattermost Advisory ID: MMSA-2026-00630

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Mattermost Server

CVE-2026-44551

Open WebUI: LDAP Empty Password Authentication Bypass

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP authentication endpoint does not validate that the submitted password is non-empty before performing a Simple Bind against the LDAP server. The LdapForm Pydantic model accepts password: str with no minimum length constraint, so an empty string passes validation. The subsequent Connection.bind() call succeeds on vulnerable LDAP servers, and the application issues a full session token for the target user. This vulnerability is fixed in 0.9.0.

CVSS 3.1 · 9.1 Critical EPSS 1.5% KEV · Not listed

Vendors

Open-webui Openwebui

Products

Open-webui Open Webui

CVE-2026-8728

Open5GS NRF conv.c ogs_sbi_discovery_option_parse_plmn_list denial of service

A security vulnerability has been detected in Open5GS up to 2.7.7. The impacted element is the function ogs_sbi_discovery_option_parse_plmn_list in the library /lib/sbi/conv.c of the component NRF. Such manipulation of the argument target-plmn-list leads to denial of service. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Open5gs

Products

Open5gs

CVE-2026-8509

chromium-browser: chromium-browser: Heap buffer overflow in WebML

Heap buffer overflow in WebML in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Critical)

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Apple Google Linux and 1 more

Products

Macos Chrome Linux Kernel and 1 more

CVE-2026-8511

chromium-browser: chromium-browser: Use after free in UI

Use after free in UI in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed

Vendors

Apple Google Linux and 1 more

Products

Macos Chrome Linux Kernel and 1 more

CVE-2026-8512

chromium-browser: chromium-browser: Use after free in FileSystem

Use after free in FileSystem in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Apple Google Linux and 1 more

Products

Macos Chrome Linux Kernel and 1 more

CVE-2026-8514

chromium-browser: chromium-browser: Use after free in Aura

Use after free in Aura in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Apple Google Linux and 1 more

Products

Macos Chrome Linux Kernel and 1 more

CVE-2026-8515

chromium-browser: chromium-browser: Use after free in HID

Use after free in HID in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Apple Google Linux and 1 more

Products

Macos Chrome Linux Kernel and 1 more

CVE-2026-41486

Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization

Ray is an AI compute engine. From version 2.54.0 to before version 2.55.0, Ray Data registers custom Arrow extension types (ray.data.arrow_tensor, ray.data.arrow_tensor_v2, ray.data.arrow_variable_shaped_tensor) globally in PyArrow. When PyArrow reads a Parquet file containing one of these extension types, it calls __arrow_ext_deserialize__ on the field's metadata bytes. Ray's implementation passes these bytes directly to cloudpickle.loads(), achieving arbitrary code execution during schema parsing, before any row data is read. This issue has been patched in version 2.55.0.

CVSS 4.0 · 8.9 High EPSS < 1% KEV · Not listed

Vendors

Anyscale Ray Project

Products

Ray Ray

CVE-2026-41432

New API: Stripe Webhook Signature Bypass via Empty Secret Enables Unlimited Quota Fraud

New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to version 0.12.10, a vulnerability exists in the Stripe webhook handler that allows an unauthenticated attacker to forge webhook events and credit arbitrary quota to their account without making any payment. This issue has been patched in version 0.12.10.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Newapi Quantumnous

Products

New Api New-api