CVE-2026-18223: Incorrect Authorization

Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to validate the invited recipient's email address when redeeming team and guest invitation tokens, which allows an authenticated attacker to join a team or gain unauthorized access to private channels vi...

PT-2026-115507

Name of the Vulnerable Software and Affected Versions Mattermost version 11.10.0 Mattermost versions 11.7.x through 11.7.9 Mattermost versions 11.9.x through 11.9.1 Mattermost versions 11.8.x through 11.8.5 Description An issue exists where the system fails to validate the invited recipient's ema...

Mattermost authorization issue vulnerabilities

Mattermost versions 11.10.0 and earlier of 11.10.x series, 11.7.9 and earlier of 11.7.x series, 11.9.1 and earlier of 11.9.x series, and 11.8.5 and earlier of 11.8.x series have an authorization issue vulnerability. This vulnerability stems from the lack of verification of the recipient’s email...

EUVD-2026-97859

Telegram-Stremio through 5.1.0 contains a broken object-level authorization vulnerability that allows authenticated token holders to access arbitrary chat messages by forging unsigned, unauthenticated stream IDs decoded via encodestring/decodestring functions. Attackers can craft or enumerate...

CVE-2026-9693

Mattermost versions 10.11.x = 10.11.20, 11.7.x = 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via t...

CVE-2026-9693

Mattermost 10.11.x (≤10.11.20) and 11.7.x (≤11.7.5) fail to delete thread membership records when a user leaves or is removed from a team. A previously removed user who is later re-invited can access private channel thread root post content and metadata via the team threads API, causing low confi...

CVE-2026-59714

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a...

CVE-2026-48078

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.5, the unauthenticated /api/tenants/id/schedule endpoint returns every non-archived channel for a tenant regardless of the channel's isPublic flag. Channels marked...

CVE-2026-48078 OpenReception's schedule endpoint discloses isPublic=false channels and slot availability to unauthenticated callers

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.5, the unauthenticated /api/tenants/id/schedule endpoint returns every non-archived channel for a tenant regardless of the channel's isPublic flag. Channels marked...

CVE-2026-48078

OpenReception’s CVE-2026-48078 affects the scheduling endpoint prior to version 1.0.5. The unauthenticated /api/tenants/{id}/schedule endpoint exposed all non-archived channels for a tenant, including those with isPublic = false, disclosing channel names, descriptions, IDs, agent associations, pa...

EUVD-2026-54148

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.5, the unauthenticated /api/tenants/id/schedule endpoint returns every non-archived channel for a tenant regardless of the channel's isPublic flag. Channels marked...

CVE-2026-48076 OpenReception's bootstrap booking flow allows unauthenticated booking on isPublic=false channels

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. The new-client booking flow in versions 1.0.1 and prior consists of three calls: bootstrap-challenge returns a 16-bit PoW challenge with difficulty=4 leading hex zeroes, bootstrap-verify...

CVE-2026-48076 OpenReception's bootstrap booking flow allows unauthenticated booking on isPublic=false channels

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. The new-client booking flow in versions 1.0.1 and prior consists of three calls: bootstrap-challenge returns a 16-bit PoW challenge with difficulty=4 leading hex zeroes, bootstrap-verify...

CVE-2026-48076

OpenReception’s bootstrap booking flow (versions ≤1.0.1) is vulnerable to an unauthenticated booking against private channels due to a missing channel binding in the booking token. The 3-step flow: bootstrap-challenge (PoW), bootstrap-verify (issues a booking access token), and create-new-client ...

EUVD-2026-54145

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. The new-client booking flow in versions 1.0.1 and prior consists of three calls: bootstrap-challenge returns a 16-bit PoW challenge with difficulty=4 leading hex zeroes, bootstrap-verify...

CVE-2026-48076

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. The new-client booking flow in versions 1.0.1 and prior consists of three calls: "bootstrap-challenge" returns a 16-bit PoW challenge with "difficulty=4" leading hex zeroes,...

CVE-2026-48076 OpenReception's bootstrap booking flow allows unauthenticated booking on isPublic=false channels

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. The new-client booking flow in versions 1.0.1 and prior consists of three calls: bootstrap-challenge returns a 16-bit PoW challenge with difficulty=4 leading hex zeroes, bootstrap-verify...

CVE-2026-48078: Exposure of Sensitive Information to an Unauthorized Actor

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.5, the unauthenticated /api/tenants/id/schedule endpoint returns every non-archived channel for a tenant regardless of the channel's isPublic flag. Channels marked...

PT-2026-68740

Name of the Vulnerable Software and Affected Versions OpenReception versions prior to 1.0.5 Description The unauthenticated '/api/tenants/id/schedule' endpoint returns all non-archived channels for a tenant, ignoring the isPublic flag. This allows the disclosure of private channels intended to be...

SUSE CVE-2026-5163

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...