CVE-2026-66012

SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check (model.CheckAuth) with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy actions across the entire workspace. When the Publish server is enabled in anonymous mode (Conf.Publish.Enable=true and Conf.Publish.Auth.Enable=false), the Publish reverse proxy attaches an anonymous RoleReader JWT to proxied requests, allowing a remote unauthenticated attacker to reach /mcp. The attacker can read conf/conf.json to extract accessAuthCode, api.token, and cookieKey in plaintext, write arbitrary files in the workspace, and plant a plugin into data/plugins/ that executes with nodeIntegration:true and no contextIsolation on the next desktop launch, leading to administrator takeover.

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

Vendors

B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-66009

Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages

Parse Server versions >= 9.0.0 before 9.10.0-alpha.5 and >= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id — with no user session, master key, or maintenance key — can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Parse Community Parseplatform

Products

Parse Server Parse-server

CVE-2026-66008

Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages

Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87 disclose Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled (graphQLPublicIntrospection: false, the default). Because these errors are produced before authentication, authorization, or any resolver runs, an unauthenticated client possessing only the public application ID can trigger errors on Pointer or Relation fields to reconstruct hidden schema class names, partially defeating the schema-hiding protection. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Parse Community Parseplatform

Products

Parse Server Parse-server

CVE-2026-66006

lakeFS Unauthenticated Operator Metadata Overwrite via setup_comm_prefs

lakeFS through 1.83.0, fixed in commit 71a45ee, contains an authentication bypass vulnerability in the /setup_comm_prefs endpoint that allows unauthenticated attackers to overwrite operator metadata including email, name, and company after setup completion. Attackers can POST to this endpoint to modify security update preferences, disable security communications, and trigger falsified telemetry events using the legitimate installation ID.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Lakefs Treeverse

Products

Lakefs Lakefs

CVE-2026-65917

CyberPanel IncBackups IDOR via Sequential Backup ID

CyberPanel through 1.9.1, fixed in commit b198460, contains an insecure direct object reference (IDOR) vulnerability in the IncBackups application's incremental-backup handlers (deleteBackup, fetchRestorePoints, and restorePoint) that allows authenticated panel users to access or manipulate other tenants' backup resources by supplying an attacker-controlled globally sequential IncJob integer ID that is never re-scoped to the authorized domain. Attackers can enumerate sequential backup IDs to read another tenant's backup metadata, irrecoverably delete another tenant's backup snapshots, or trigger unauthorized restoration of another tenant's backup job with root privileges.

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

Vendors

Cyberpanel Usmannasir

Products

Cyberpanel Cyberpanel

CVE-2026-65916

CyberPanel Missing Authorization in cancelBackupCreation Handler

CyberPanel through 1.9.1, fixed in commit b198460, contains a missing authorization vulnerability in the cancelBackupCreation handler that allows authenticated users to kill, delete, and corrupt other tenants' backups. Attackers can send crafted POST requests with arbitrary backupCancellationDomain and fileName parameters to terminate backup processes, delete backup archives, corrupt backup status files, and remove database records belonging to other tenants.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Cyberpanel Usmannasir

Products

Cyberpanel Cyberpanel

CVE-2026-65711

sysPass 3.2.11 Authenticated OS Command Injection via Backup Path

sysPass through version 3.2.11 contains an OS command injection vulnerability that allows authenticated administrators to execute arbitrary commands as the web server process user by setting a malicious backup path and triggering a backup. The FileBackupService builds a tar shell command via string concatenation, inserting the admin-configurable siteBackupPath setting without escapeshellarg() or equivalent sanitization before passing it to exec(), causing injected commands to persist and execute on every subsequent backup trigger.

CVSS 4.0 · 8.6 High EPSS 2.0% KEV · Not listed

Vendors

Cygnux Nuxsmin

Products

Syspass Syspass

CVE-2026-65710

sysPass 3.2.11 Missing Authorization via PublicLinkController Account Decryption

sysPass through version 3.2.11 contains a missing authorization vulnerability that allows authenticated users with the PUBLICLINK_CREATE profile flag to trigger unauthorized decryption and persistent storage of any vault account's password by exploiting the absence of AccountAcl checks in the public link creation flow. Attackers can invoke the saveCreateFromAccountAction endpoint to cause AccountService::getDataForLink to load arbitrary target accounts without AccountFilterUser restrictions, decrypt credentials using the session master key, and serialize cleartext passwords into Vault storage on the PublicLink database row, enabling subsequent unauthenticated retrieval if the generated link hash is recovered.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Cygnux Nuxsmin

Products

Syspass Syspass

CVE-2026-65709

sysPass 3.2.11 Missing Object-Level Authorization via JSON-RPC API

sysPass through version 3.2.11 contains a missing object-level authorization vulnerability in the JSON-RPC API that allows API token holders to enumerate account metadata, overwrite passwords, and delete accounts across the entire vault without per-account access control. Attackers can invoke AccountController methods such as viewAction, editAction, deleteAction, and editPassAction without AccountFilterUser checks to modify or delete accounts beyond the scope of their assigned token permissions.

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

Vendors

Cygnux Nuxsmin

Products

Syspass Syspass

CVE-2026-65708

sysPass 3.2.11 Insecure Direct Object Reference via AccountFileController

sysPass through version 3.2.11 contains an insecure direct object reference vulnerability that allows any authenticated attacker to access account file attachments belonging to accounts they do not have ACL permissions for by exploiting missing authorization checks in AccountFileController. Attackers can supply arbitrary numeric file IDs through the download, view, delete, upload, and list actions to enumerate and manipulate any attachment in the vault, bypassing account-level access controls entirely.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Cygnux Nuxsmin

Products

Syspass Syspass

CVE-2026-65707

Likeshop 3.0.5 Authenticated SQL Injection via adjustAccount Endpoint

Likeshop through 3.0.5 contains an authenticated SQL injection vulnerability that allows admin-level users to extract arbitrary database contents by submitting unsanitized POST parameters to the adjustAccount endpoint. The adjustAccount method in UserLogic.php concatenates the money, integral, growth, and earnings parameters directly into Db::raw() SQL fragments without type casting, numeric validation, or parameter binding, enabling boolean-based binary-search extraction of credentials, PII, and session tokens via distinct success and failure response messages.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Likeadmin-likeshop Likeshop

Products

Likeshop Likeshop

CVE-2026-65706

FFmpeg 3.0 - 8.1.2 vf_swaprect Out-of-Bounds Write via NV12 Frame Processing

FFmpeg versions 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame with odd width dimensions. The filter_frame() function reuses a temporary row buffer sized for plane 0's single-byte pixel step across all planes, causing an 18-byte memcpy into a 17-byte heap allocation when processing the two-byte-per-sample interleaved chroma plane of a 17x16 NV12 frame, resulting in heap corruption and process crash with potential for code execution.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-65705

FFmpeg 3.4 - 8.1.2 vf_floodfill Out-of-Bounds Write via filter_frame()

FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-65704

FFmpeg 8.1.2 Out-of-Bounds Write via TY Demuxer and Shorten Decoder

FFmpeg through 8.1.2 contains an out-of-bounds write vulnerability that allows attackers to cause heap corruption by supplying a crafted ffconcat file processed with the -safe 0 flag. The TY demuxer's demux_audio() function decrements packet size without bounds checking, producing a negative size value that is passed to memcpy() in shorten_decode_frame(), where conversion to size_t wraps the value to near SIZE_MAX and triggers reads beyond the source allocation and writes far beyond the Shorten decoder's bitstream buffer.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-65703

FFmpeg 2.7 - 8.1.2 Out-of-Bounds Write in TDSC Video Decoder

FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Ffmpeg

Products

Ffmpeg

CVE-2026-65694

Microweber CMS 2.0.20 Path Traversal via ServeStaticFileController

Microweber CMS through 2.0.20 contains a path traversal vulnerability in the static file controller that allows unauthenticated remote attackers to read arbitrary files by supplying directory traversal sequences in the path query parameter. Attackers can send a single unauthenticated HTTP GET request exploiting the failure of normalize_path() to strip traversal sequences, disclosing sensitive files such as environment configuration files containing credentials and system files.

CVSS 4.0 · 8.7 High EPSS 3.4% KEV · Not listed

Vendors

Microweber

Products

Microweber

CVE-2026-65693

Microweber CMS 2.0.20 Server-Side Template Injection via Mail Templates

Microweber CMS through 2.0.20 contains a server-side template injection vulnerability that allows authenticated administrators to achieve arbitrary OS command execution by injecting Twig expressions into mail templates. Attackers can exploit the unsandboxed Twig environment in TwigView::render(), which lacks SandboxExtension or a SecurityPolicy, to inject malicious expressions such as filter('system') into mail template bodies stored unsanitized in the database, causing automatic payload execution on each subsequent application event that triggers a mail dispatch.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Microweber

Products

Microweber

CVE-2026-65607

SiYuan before v3.7.2 Path Traversal via /export/temp/

SiYuan before v3.7.2 contains a path traversal vulnerability in the /export/temp/ short-circuit branch of the serveExport handler (kernel/server/serve.go). Unlike the main export branch, this branch joins the raw, percent-decoded request path with util.TempDir and serves the file without the IsSubPath or IsSensitivePath checks added in the earlier export-disclosure hardening (GHSA-6865-qjcf-286f). An authenticated attacker can send percent-encoded traversal sequences (e.g. /export/temp/%2e%2e/.../etc/passwd, where %2e%2e is decoded to '..') to read arbitrary files outside TempDir, including /etc/passwd, SSH keys (~/.ssh/*), and SiYuan workspace *.db and *.log files, bypassing the sensitive-file protection.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-65606

SiYuan before v3.7.2 Cross-Site Scripting to RCE

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an <img onerror=...> element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-65605

SiYuan before v3.7.2 Stored XSS to RCE via Attribute View

SiYuan before v3.7.2 contains a stored cross-site scripting vulnerability in Attribute View (database) cell rendering. A Template column value is rendered as HTML via text/template without auto-escaping, and EscapeHTML is only applied when HasUnclosedHtmlTag returns true; because balanced self-closing tags such as <img> are skipped by that check, a payload like <img src=x onerror=...> is stored unescaped and later inserted into the page via innerHTML, executing when the database is viewed. Because the desktop renderer runs with nodeIntegration enabled, the injected script can reach require and escalate to arbitrary command execution.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

Products

Siyuan Siyuan