PT-2026-58548

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description An out-of-bounds read exists in Microsoft Office Excel, which allows an unauthorized attacker to execute code locally when a user opens a malicious file. Recommendations Apply...

PT-2026-58584

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description A stack-based buffer overflow exists in Microsoft Office Excel, which could allow an unauthorized attacker to execute code locally. This issue can be triggered when a user open...

Security Updates for Microsoft Office Online Server (July 2026)

The Microsoft Office Online Server or Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. CVE-2026-47642,...

PT-2026-58544

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description An integer underflow wrap or wraparound occurs when an arithmetic operation results in a value smaller than the minimum representable value for the data type, causing it to wra...

PT-2026-58534

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description A heap-based buffer overflow exists in Microsoft Office Excel, which could allow an unauthorized attacker to execute arbitrary code locally. A heap-based buffer overflow occurs...

PT-2026-58589

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting memory. This issue allows an unauthorized...

PT-2026-58579

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description An untrusted pointer dereference allows an unauthorized attacker to execute code locally via a specially crafted spreadsheet. Recommendations At the moment, there is no...

Security Updates for Microsoft Excel Products (July 2026)

The Microsoft Excel Products are missing a security update. They are, therefore, affected by multiple vulnerabilities: - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. CVE-2026-55054 - Heap-based buffer overflow in Microsoft...

PYSEC-2026-2744 Open WebUI has stored XSS in Excel file preview

Summary Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload can be used to cause the sheetjs function sheettohtml to embed an XSS payload into the generated HTML. This is subsequently added to the DOM unsanitized via @html causing the payload to trigger. Details The...

PT-2026-63656

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet affected versions not specified Description The OLE reader in PhpSpreadsheet follows sector chains from XLS/OLE metadata without detecting cycles or enforcing a maximum chain length. A malformed file can set the small-block depo...

EUVD-2026-42079

Actual is a local-first personal finance app. Prior to 26.6.0, @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed, whose escapeCsv helper only handles RFC 4180 delimiter, quote, and newline escaping and does not...

CVE-2026-46672

Actual is a local-first personal finance app. Prior to 26.6.0, @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed, whose escapeCsv helper only handles RFC 4180 delimiter, quote, and newline escaping and does not...

PT-2026-56159

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, Excelize parses shared-string cell values with strconv.Atoi and checks only the upper bound before indexing the shared string slice, allowing an XLSX file containing a shared-string cell with ...

PT-2026-56158

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small XLSX file with a row number above 1048576 and no cell...

PT-2026-56151

Name of the Vulnerable Software and Affected Versions Excelize versions prior to 2.11.0 Description The checkSheet function in github.com/xuri/excelize/v2 fails to validate the XML attribute value before using it as the length argument for a slice allocation in makexlsxRow, row. This lack of...

PYSEC-2026-331 excel-mcp-server has a Path Traversal issue

Summary A path traversal vulnerability exists in excel-mcp-server versions up to and including 0.1.7. When running in SSE or Streamable-HTTP transport mode the documented way to use this server remotely, an unauthenticated attacker on the network can read, write, and overwrite arbitrary files on...

GHSA-7GH7-258J-4MPQ @actual-app/cli `--format csv` Output Vulnerable to CSV Formula Injection via Custom `escapeCsv` Helper

Summary @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed whose escapeCsv helper only handles RFC 4180 delimiter/quote/newline escaping. It does not neutralize the standard CSV formula-injection prefixes =, +, -...

CVE-2026-12862

Untrusted user data was passed verbatim to Excel exports for administrators. This allowed formula injection which can be used to compromise the environment of the user loading the file or other data in the file...

CVE-2026-12862

The CVE-2026-12862 entry documents a formula-injection risk in XLSX exports where untrusted user data is passed directly to Excel exports for administrators. Root cause: untrusted data used in the export path enables Excel formulas to be interpreted when the file is opened, potentially compromisi...

CVE-2026-12862 XLSX formula injection in exports

Untrusted user data was passed verbatim to Excel exports for administrators. This allowed formula injection which can be used to compromise the environment of the user loading the file or other data in the file...