CVE-2026-4915

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to filter nil elements from outgoing webhook attachment payloads before processing, which allows an authenticated user to cause a denial of service server process termination via a crafted webhook...

CVE-2026-4915 Server panic via outgoing webhook responses

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to filter nil elements from outgoing webhook attachment payloads before processing, which allows an authenticated user to cause a denial of service server process termination via a crafted webhook...

EUVD-2026-31646

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to filter nil elements from outgoing webhook attachment payloads before processing, which allows an authenticated user to cause a denial of service server process termination via a crafted webhook...

CVE-2026-4915

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to filter nil elements from outgoing webhook attachment payloads before processing, which allows an authenticated user to cause a denial of service server process termination via a crafted webhook...

Mattermost 安全漏洞

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. A security vulnerability in Mattermost versions 11.6.0 and prior to 11.6.x, 11.5.3 and prior to 11.5.x, 11.4.4 and prior to 11.4.x, and 10.11.14 and prior to 10.11.x, which stems from a failure to filt...

CVE-2026-40597

Mantis Bug Tracker MantisBT is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker can bypass the Content Security Policy's script-src directive by uploading a crafted attachment to any issue that, when accessed via th...

CVE-2026-40597

CVE-2026-40597 affects MantisBT 2.28.1 and earlier. A pre‑existing XSS/HTML injection vulnerability can be chained with a crafted attachment uploaded to an issue; when downloaded via file_download.php, the attachment can be served with a valid JavaScript MIME type, bypassing CSP script-src and ex...

CVE-2026-40597 MantisBT has a Content Security Policy bypass via attachments

Mantis Bug Tracker MantisBT is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker can bypass the Content Security Policy's script-src directive by uploading a crafted attachment to any issue that, when accessed via th...

CVE-2026-40597 MantisBT has a Content Security Policy bypass via attachments

Mantis Bug Tracker MantisBT is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker can bypass the Content Security Policy's script-src directive by uploading a crafted attachment to any issue that, when accessed via th...

CVE-2026-9246

Improper access control in the entry documentation and attachment features in Devolutions Server allows an authenticated user with vault read access to retrieve the documentation and attachments of sealed entries via a crafted API request. This issue affects : Devolutions Server 2026.1.6.0 throug...

CVE-2026-9248

Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : Devolutions Server 2026.1.6.0...

CVE-2026-9246

CVE-2026-9246 : Improper access control in Devolutions Server’s entry documentation and attachment features allows an authenticated user with vault read access to retrieve documentation and attachments of sealed entries via a crafted API request. Affected: Devolutions Server 2026.1.6.0–2026.1.16....

EUVD-2026-31458

Improper access control in the entry documentation and attachment features in Devolutions Server allows an authenticated user with vault read access to retrieve the documentation and attachments of sealed entries via a crafted API request. This issue affects : Devolutions Server 2026.1.6.0 throug...

CVE-2026-9246

Improper access control in the entry documentation and attachment features in Devolutions Server allows an authenticated user with vault read access to retrieve the documentation and attachments of sealed entries via a crafted API request. This issue affects : Devolutions Server 2026.1.6.0 throug...

CVE-2026-9246

Improper access control in the entry documentation and attachment features in Devolutions Server allows an authenticated user with vault read access to retrieve the documentation and attachments of sealed entries via a crafted API request. This issue affects : Devolutions Server 2026.1.6.0 throug...

CVE-2026-9248

Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : Devolutions Server 2026.1.6.0...

CVE-2026-9248

Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : Devolutions Server 2026.1.6.0...

EUVD-2026-31454

Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : Devolutions Server 2026.1.6.0...

CVE-2026-9248

CVE-2026-9248 details an authorization bypass in Devolutions Server’s entry-duplication feature. An authenticated user with write access to any vault can craft a save request to copy documentation and attachments from an entry in a vault they cannot access. Affected versions include Devolutions S...

EUVD-2026-31354

Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/messagepage' endpoint returns the full content of any conversation message. An unauthenticated attacker can enumerate all conversation messages, including messages from restricted pages, member-only areas, and th...