CVE-2026-53905

Unauthorized Access to Administrator ACL View in MCO

MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/admin-view-hierarchy/get-acl-tree-structure endpoint. An authenticated, low-privileged user can retrieve administrator access control structures without proper authorization checks. This may expose sensitive permission mappings and internal configuration details. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

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

Vendors

Mycomplianceoffice

Products

Mco Mycomplianceoffice

CVE-2026-53906

Path Disclosure and Path Traversal in MCO

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed

Vendors

Mycomplianceoffice

Products

Mco Mycomplianceoffice

CVE-2026-53907

Stored Cross‑Site Scripting in MCO

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Mycomplianceoffice

Products

Mco Mycomplianceoffice

CVE-2026-53908

User Enumeration in MCO

MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and invalid users during username reminder and password reset operations. An attacker can leverage these differences to enumerate valid usernames and email addresses. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

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

Vendors

Mycomplianceoffice

Products

Mco Mycomplianceoffice

CVE-2026-53909

Arbitrary File Upload in MCO

MCO does not correctly validate types of uploaded files. File upload validation functionality relies only on client-side checks, which can be bypassed. An authorized, low-privileged attacker can upload files with arbitrary types to the server. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

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

Vendors

Mycomplianceoffice

Products

Mco Mycomplianceoffice

CVE-2026-5120

Race Condition vulnerability affecting BIOVIA Workbook from Release 2021 through Release 2026

A Race Condition vulnerability affecting BIOVIA Workbook from Release 2021 through Release 2026 could allow a user to access unauthorized data from another user.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Dassault Systèmes

Products

Biovia Workbook

CVE-2026-8387

Relative Path Traversal in allegroai/clearml

A vulnerability in allegroai/clearml versions up to and including 1.16.5 allows for relative path traversal when extracting `.zip` archives using the `ZipFile.extractall()` method in `StorageManager._extract_to_cache()`. This issue arises due to the lack of path traversal validation, enabling an attacker to write arbitrary files to the filesystem. Attack vectors include dataset downloads, artifact downloads, model downloads, and offline session imports. The vulnerability can lead to remote code execution through methods such as cron job injection, SSH key overwrite, or web shell deployment. The issue is resolved in version 2.1.6.

CVSS 3.0 · 2.4 Low EPSS < 1% KEV · Not listed

Vendors

Allegroai

Products

Clearml

CVE-2026-6682

FatFs Integer Overflow in FAT32 Volume Mount

In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mount_volume() where fasize *= fs->n_fats can wrap, leading to attacker-controlled file-size metadata and unsafe read lengths in downstream callers. This maps to CWE-190 (Integer Overflow or Wraparound). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). Remote delivery is also possible in OTA/update pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

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

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-6683

FatFs Divide-by-Zero in exFAT Sync

FatFs R0.16 and earlier contains a divide-by-zero in exFAT sync logic bug when crafted metadata causes n_fatent - 2 to be zero during write/sync operations. This maps to CWE-369 (Divide By Zero). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (4.6, Medium). Network-delivered update media can make this remote in some pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.

CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-6684

FatFs Infinite Loop in GPT Partition Scan

FatFs prior to R0.16 that use GPT scanning with 'FF_LBA64 = 1' contains an issue where an unbounded loop count derived from GPT header field GPTH_PtNum, enabling extremely long or effectively infinite mount-time scans. This maps to CWE-835 (Loop with Unreachable Exit Condition). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.

CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-6686

FatFs Use of Uninitialized Clusters After Seek Past EOF

FatFs R0.16 and earlier contains an uninitialized cluster exposure when f_lseek() extends files beyond EOF without zero-filling newly allocated clusters. This maps to CWE-908 (Use of Uninitialized Resource). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.

CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-6687

FatFs Stack Buffer Overflow via Uncapped exFAT Label Length

FatFs R0.16 and earlier contains a stack overflow bug in f_getlabel() because exFAT label length (XDIR_NumLabel) is trusted without enforcing spec maximums. This maps to CWE-121 (Stack-based Buffer Overflow). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

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

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-6688

FatFs Buffer Overflow via Unbounded LFN Filename Copy

FatFs R0.16 and earlier contains a downstream-caller vulnerability pattern associated with FatFs long filename handling. With LFN enabled, fno.fname can be up to 255 characters; many callers copy it into short fixed buffers without bounds checks, causing overflow. This maps to CWE-120 (Buffer Copy without Checking Size of Input). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

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

Vendors

Chan Elm-chan

Products

Fatfs Fatfs

CVE-2026-5220

Stored XSS in DivvyDrive Information Technologies' DivvyDrive

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in DivvyDrive Information Technologies Inc. DivvyDrive allows Stored XSS. This issue affects DivvyDrive: from 4.8.2.23 before v.4.8.3.1.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed

Vendors

Divvydrive

Products

Divvydrive

CVE-2026-6283

Stored XSS in DivvyDrive Information Technologies' DivvyDrive

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in DivvyDrive Information Technologies Inc. DivvyDrive allows Stored XSS. This issue affects DivvyDrive: from v.4.8.2.23 before v.4.8.3.1.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Divvydrive

Products

Divvydrive

CVE-2026-58399

@acastellon/auth has an authentication bypass via spoofable headers in validateToken()

@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken() through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for auth-user: service-brother when req.get('host').startsWith(getHostName()). Both values involved in the check can be influenced by an unauthenticated HTTP client: auth-user is a request header, and Host is also client-controlled. As a result, a remote unauthenticated attacker can send a request with crafted headers and bypass token validation before the normal legacy/JWT/OIDC validation logic runs. A fix has been implemented in v2.3.0.

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

Vendors

Antonio-castellon

Products

Module-auth

CVE-2026-13706

UrlShortener extension url validation can be bypassed due to difference between php url parsing and WHATWG

Improper input validation vulnerability in Wikimedia Foundation UrlShortener. This vulnerability is associated with program files includes/UrlShortenerUtils.Php.

CVSS 4.0 · 0 Low EPSS < 1% KEV · Not listed

Vendors

Mediawiki Wikimedia

Products

Mediawiki Urlshortener

CVE-2025-15646

HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion

HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion. Support for the <template> element was added to libgumbo 0.10.0 in 2015, but the walk_tree function in lib/HTML/Gumbo.xs was not updated to support it. The element was treated as a text-node, where strlen() over-reads the heap block that the pointer addresses. Any caller that runs parse() with the default format => 'string', or with format => 'tree', on input containing a <template> element serializes the over-read bytes into the returned result, disclosing bounded heap contents. format => 'callback' reaches a croak on the unhandled node type and is unaffected.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Bps

Products

Html::gumbo

CVE-2026-58126

PACSgear PACS Scan 5.2.1 Unauthenticated RCE via .NET Remoting TCP Service

PACSgear PACS Scan 5.2.1 contains an unauthenticated remote code execution vulnerability that allows remote attackers to read and write arbitrary files by exploiting an exposed .NET Remoting TCP service on port 22222 via PGImageExchQueue.exe without any authentication requirement. Attackers can chain the arbitrary file write primitive with DLL hijacking in PGImageExchangeQueueSvc.exe, which loads missing DLLs such as CRYPTSP.DLL from the application directory, to achieve remote code execution as NT Authority\SYSTEM upon service restart.

CVSS 4.0 · 9.3 Critical EPSS 1.8% KEV · Not listed

Vendors

Hyland

Products

Pacsgear Pacsgear Pacs Scan

CVE-2026-58127

PACSgear MediaWriter 5.2.1 Unauthenticated RCE via .NET Remoting TCP Service

PACSgear MediaWriter 5.2.1 exposes a .NET Remoting TCP service on port 9000 via PacsgearMediaServerEngine.dll, registered with ObjectURIs RemoteObj and UIRemoteObj, without any authentication requirement. By exploiting the MarshalByRefObject object unmarshalling technique and implementing .NET WebClient class methods, an unauthenticated remote attacker can read and write arbitrary files on the host filesystem. The ObjectURIs are identical across all installations by default. Chaining the arbitrary file write primitive with DLL hijacking opportunities in the MediaWriter service (which runs as NT Authority\\SYSTEM and loads missing DLLs such as CRYPTBASE.DLL from the application directory) enables unauthenticated remote code execution as SYSTEM upon service restart.

CVSS 4.0 · 9.3 Critical EPSS 1.9% KEV · Not listed

Vendors

Hyland

Products

Pacsgear Pacsgear Mediawriter