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CVE-2026-10527

Boards plugin retains Board Admin rights for users demoted to System Guest

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to reconcile SchemeAdmin flags with a user's current role which allows a user demoted to System Guest to retain Board Admin privileges and perform admin-only operations via the Boards REST API or UI.. Mattermost Advisory ID: MMSA-2026-00691

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Mattermost Server
CVE-2026-48508

Lemur: Authorization bypass in StrictRolePermission / AuthorityCreatorPermission

Lemur manages TLS certificate creation. Prior to 1.9.1, StrictRolePermission and AuthorityCreatorPermission in lemur/auth/permissions.py call flask_principal.Permission.__init__() with zero Need objects when ADMIN_ONLY_AUTHORITY_CREATION and LEMUR_STRICT_ROLE_ENFORCEMENT are unset because both flags default to False. Flask-Principal Permission.allows() returns True when self.needs is empty, so the .can() authorization gate permits every authenticated identity, including the read-only role. A read-only user can access POST /api/1/authorities, POST /api/1/certificates/upload, POST /api/1/pending_certificates//upload, POST /api/1/notifications, PUT or DELETE /api/1/notifications/, and POST /api/1/domains to create root Certificate Authorities, upload arbitrary certificates, create or edit notifications that reach an SSRF sink, and create domain entries. Explicitly setting either flag to False continues to opt into the permissive behavior. This issue is fixed in version 1.9.1.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Netflix
Products
Lemur
CVE-2026-45121

MyBB: Insufficient permission check for calendar select

MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not check permissions consistently when listing calendars, allowing authenticated users to access titles of calendars that are otherwise inaccessible. The affected calendar-selection paths in calendar.php perform permission checks against an invalid calendar context before returning calendar titles. The uniquely identifying implementation details include titles of inaccessible calendars, and invalid calendar permission context. This issue is fixed in version 1.8.40.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mybb
Products
Mybb
CVE-2026-45122

MyBB: Insufficient permission check for calendar event move

MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not validate moderation permissions for the destination calendar when moving events. A user with moderation permission for the source calendar can move an event to a calendar where the user has only viewing permission because the do_move action in calendar.php does not check canmoderateevents for the target calendar. The uniquely identifying implementation details include calendar event move, source calendar moderation permission, and destination calendar viewing permission. This issue is fixed in version 1.8.40.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mybb
Products
Mybb
CVE-2026-75480

OpenViking Debug Vector Endpoints Multi-tenant Data Exposure

OpenViking debug vector scroll and count endpoints apply only account-level scoping without user-level access controls, allowing authenticated users to read all co-tenant records. Attackers can query these endpoints to retrieve private memories, resources, skills, and secret material belonging to other users in the same account without administrative privileges.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Volcengine
Products
Openviking
CVE-2026-44846

JumpServer: Privilege Overwrite via Organization Invite Logic Flaw

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, a user with the users.invite_user permission can submit an existing member to POST /api/v1/users/users/invite/, causing the organization invitation logic in apps/users/api/user.py to execute user.org_roles.set(org_roles) and replace the member's existing organization roles, which can escalate privileges or downgrade administrators. This issue is fixed in version 4.10.17.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed
Vendors
Jumpserver
Products
Jumpserver
CVE-2026-73305

Budibase: Privilege escalation via public role assignment API missing app-level authorization

Budibase is an open-source low-code platform. Prior to 3.39.24, POST /api/public/v1/roles/assign called validateGlobalRoleUpdate without checking appBuilder.appId or role.appId in packages/server/src/api/controllers/public/globalRoleValidation.ts. An app-scoped builder could scope the request to an app they control and then grant themselves builder access or an arbitrary role in another app, exposing that app data, datasource configuration, and automations. This issue is fixed in version 3.39.24.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Budibase
Products
Budibase
CVE-2026-73049

SiYuan before v3.7.4 Information Disclosure via getAttributeViewBacklinks

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the getAttributeViewBacklinks endpoint that consults the forbidden access list instead of the visibility list when filtering backlinks. Anonymous readers can supply a publicly visible database row identifier to discover hidden-tier documents that reference it, receiving the database name, row title, and document path of hidden documents.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
B3log Siyuan
Products
Siyuan Siyuan
CVE-2026-74248

Octavia QoS Policy Authorization Bypass Preventing Policy Deletion

OpenStack Octavia through 18.0.0 mishandles quality of service (QoS) policy authorization. By associating another project's QoS policy with an amphora, an authenticated user may prevent deletion of that policy. All Octavia deployments are affected.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Openstack
Products
Octavia
CVE-2026-54698

Hasura: Row-level authorization bypass on table computed fields

Hasura is an open-source product that provides users GraphQL or REST APIs. Prior to 2.49.2 and 2.45.5, a user can use a where clause on a table computed field (returning SETOF some_table) to infer row values that ought to be filtered for their role based on some_table's row-level permissions. While such rows cannot be returned directly, like predicates on strings for instance allow values to be brute forced efficiently with the where clause as an oracle. This issue is fixed in versions 2.49.2 and 2.45.5.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Vendors
Hasura
Products
Graphql Engine
CVE-2026-71381

Adobe Genuine Software Integrity Service | CWE-863 Incorrect Authorization

Adobe Genuine Software Integrity Service on Windows is affected by an Incorrect Authorization vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized limited write access. Exploitation of this issue does not require user interaction, but requires the attacker to access the target desktop system locally (e.g., keyboard, console), or remotely (e.g., SMB).

CVSS 3.1 · 4 Medium EPSS < 1% KEV · Not listed
Vendors
Adobe
Products
Genuine Integrity Service
CVE-2026-49989

CrateDB's Blob HTTP handler bypasses authorization

CrateDB is a distributed SQL database. Prior to versions 6.2.8 and 6.3.2, any authenticated user can read or delete any blob whose SHA-1 digest they know, and can plant new blobs unconditionally, in any blob table, regardless of `GRANT`s. CrateDB has two ways to access blob storage: SQL (`SELECT ... FROM blob.<table>` and friends) and the blob HTTP API (`GET|PUT|DELETE /_blobs/{table}/{digest}`). The SQL path goes through `AccessControl`, which is what enforces privilege grants; that's why `SELECT digest FROM blob.secret_blobs` fails for a user who has no grants on the table. The HTTP path authenticates the request but never asks `AccessControl` whether the authenticated user is allowed to touch the table. So a user with no grants gets `MissingPrivilegeException` from SQL and `200 OK` plus the blob bytes from `GET /_blobs/secret_blobs/<digest>`. Deployments that don't use `BLOB TABLE` are unaffected. Authentication itself still works; the bug is strictly that being authenticated as anyone is treated as sufficient for any blob op. Versions 6.2.8 and 6.3.2 fix the issue.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Cratedb
Products
Cratedb
CVE-2026-73499

etcd: Watch API authorization bypass via open-ended range requests

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Etcd
Products
Etcd
CVE-2026-55987

OAuth2 sign-in reactivates an administrator-deactivated account on auth sources without refresh tokens (incomplete fix of #38009)

OAuth2 sign-in reactivates an administrator-deactivated account on auth sources without refresh tokens (incomplete fix of #38009)

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Gitea
Products
Gitea Open Source Git Server
CVE-2026-53786

rsync < 3.5.0 Filter Rule Bypass via --filter Merge Directive

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Rsync Project Samba
Products
Rsync Rsync
CVE-2026-56443

Token public-only scope bypassed on Limited-visibility owners (Repository + Package categories) — residual after CVE-2026-25714 / PR #37118

Token public-only scope bypassed on Limited-visibility owners (Repository + Package categories) — residual after CVE-2026-25714 / PR #37118

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Vendors
Gitea
Products
Gitea Open Source Git Server