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Github Security Blog
Github Security Blog
added 2026/04/29 8:24 p.m.26 views

PhpSpreadsheet has CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions

Summary The XLSX reader's ColumnAndRowAttributes::readRowAttributes method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit AddressRange::MAXROW = 1,048,576. An attacker can craft a minimal XLSX file 1.6KB containing a element that inflates...

7.5CVSS5.6AI score0.00395EPSS
SaveExploits1References3Affected Software1
OSV
OSV
added 2026/04/29 8:24 p.m.19 views

GHSA-7C6M-4442-2X6M PhpSpreadsheet has CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions

Summary The XLSX reader's ColumnAndRowAttributes::readRowAttributes method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit AddressRange::MAXROW = 1,048,576. An attacker can craft a minimal XLSX file 1.6KB containing a element that inflates...

7.5CVSS5.8AI score0.00395EPSS
SaveExploits1References3
NVD
NVD
added 2026/04/21 5:16 p.m.17 views

CVE-2026-40576

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. 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...

9.4CVSS0.00391EPSS
SaveExploits0References1
ATTACKERKB
ATTACKERKB
added 2026/04/21 4:35 p.m.8 views

CVE-2026-40576

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. 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...

9.4CVSS5.9AI score0.00391EPSS
SaveExploits0References2Affected Software1
CVE
CVE
added 2026/04/21 4:35 p.m.35 views

CVE-2026-40576

CVE-2026-40576 summary (Excel-MCP Server) : A path-traversal flaw in excel-mcp-server (versions } } (Note: The response contains the required JSON object with the concise, fact-grounded insight in Markdown.) Wait: The above seems malformed. Need only a single JSON object with insight string. Let'...

9.4CVSS5.9AI score0.00391EPSS
SaveExploits0References1
Cvelist
Cvelist
added 2026/04/21 4:35 p.m.38 views

CVE-2026-40576 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in excel-mcp-server

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. 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...

9.4CVSS0.00391EPSS
SaveExploits0References1
Vulnrichment
Vulnrichment
added 2026/04/21 4:35 p.m.6 views

CVE-2026-40576 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in excel-mcp-server

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. 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...

9.4CVSS5.9AI score0.00391EPSS
SaveExploits0References1
OSV
OSV
added 2026/04/21 4:35 p.m.11 views

CVE-2026-40576 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in excel-mcp-server

excel-mcp-server is a Model Context Protocol server for Excel file manipulation. 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...

9.4CVSS6.1AI score
SaveExploits0References3
CNVD
CNVD
added 2026/04/21 12:00 a.m.21 views

Microsoft Excel Code Execution Vulnerability (CNVD-2026-19428)

Microsoft Excel is a spreadsheet processing software in the Office suite from Microsoft USA. A code execution vulnerability exists in Microsoft Excel, which can be exploited by an attacker to execute arbitrary code on a system...

7.8CVSS6.5AI score0.00291EPSS
SaveExploits0
CNVD
CNVD
added 2026/04/21 12:00 a.m.31 views

Microsoft Excel Code Execution Vulnerability (CNVD-2026-19429)

Microsoft Excel is a spreadsheet processing software in the Office suite from Microsoft USA. A code execution vulnerability exists in Microsoft Excel, which can be exploited by an attacker to execute arbitrary code on a system...

7.8CVSS6.5AI score0.00292EPSS
SaveExploits0
CNNVD
CNNVD
added 2026/04/21 12:00 a.m.18 views

excel-mcp-server 路径遍历漏洞

excel-mcp-server is an Excel file operation server developed by Haris, a personal developer. It supports the creation, reading, and modification of workbooks. Versions of excel-mcp-server prior to 0.1.7 have a path traversal vulnerability. This vulnerability stems from the getexcelpath function n...

9.4CVSS5.8AI score0.00391EPSS
SaveExploits0References1
CNVD
CNVD
added 2026/04/21 12:00 a.m.17 views

Microsoft Excel Buffer Overflow Vulnerability (CNVD-2026-18600)

Microsoft Excel is a spreadsheet processing software in the Office suite from Microsoft USA. A security vulnerability exists in Microsoft Excel. An attacker could exploit the vulnerability to obtain sensitive information...

7.1CVSS5.3AI score0.00411EPSS
SaveExploits0
CNVD
CNVD
added 2026/04/21 12:00 a.m.26 views

Microsoft Excel Code Execution Vulnerability (CNVD-2026-19430)

Microsoft Excel is a spreadsheet processing software in the Office suite from Microsoft USA. A code execution vulnerability exists in Microsoft Excel, which can be exploited by an attacker to execute arbitrary code on a system...

7.8CVSS6.5AI score0.00291EPSS
SaveExploits0
CVE
CVE
added 2026/04/20 10:25 p.m.55 views

CVE-2026-5721

The wpDataTables WordPress plugin is affected by a stored cross-site scripting (XSS) vulnerability in all versions up to 6.5.0.4. The root cause is insufficient input sanitization and output escaping in prepareCellOutput() for the LinkWDTColumn, ImageWDTColumn, and EmailWDTColumn classes. The vul...

4.7CVSS5.9AI score0.00272EPSS
SaveExploits0References2
Vulnrichment
Vulnrichment
added 2026/04/20 10:25 p.m.10 views

CVE-2026-5721 wpDataTables – WordPress Data Table, Dynamic Tables & Table Charts Plugin <= 6.5.0.4 - Unauthenticated Stored Cross-Site Scripting via CSV/Excel Data Import

The wpDataTables – WordPress Data Table, Dynamic Tables & Table Charts Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 6.5.0.4. This is due to insufficient input sanitization and output escaping in the prepareCellOutput method of the...

4.7CVSS5.9AI score0.00272EPSS
SaveExploits0References2
Tenable Nessus
Tenable Nessus
added 2026/04/17 12:00 a.m.7 views

Security Updates for Microsoft Office Products (April 2026) (macOS)

The version of Microsoft Office for Mac installed on the remote host is affected by multiple vulnerabilities as referenced in the april-14-2026 advisory. - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally. CVE-2026-33095, CVE-2026-33115 - Out-of-boun...

8.4CVSS6.4AI score0.00411EPSS
SaveExploits0References11
RedhatCVE
RedhatCVE
added 2026/04/16 7:22 p.m.10 views

CVE-2026-39424

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, the chat export feature is vulnerable to Improper Neutralization of Formula Elements in a CSV File. When an administrator exports the application chat history to an Excel file .xlsx via the...

5.3CVSS5.8AI score0.00368EPSS
SaveExploits0References1
The Hacker News
The Hacker News
added 2026/04/16 1:05 p.m.14 views

ThreatsDay Bulletin: Defender 0-Day, SonicWall Brute-Force, 17-Year-Old Excel RCE and 15 More Stories

You know that feeling when you open your feed on a Thursday morning and it's just... a lot? Yeah. This week delivered. We've got hackers getting creative in ways that are almost impressive if you ignore the whole "crime" part, ancient vulnerabilities somehow still ruining people's days, and enoug...

9.3CVSS7.2AI score0.43063EPSS
SaveExploits8
NVD
NVD
added 2026/04/16 7:16 a.m.10 views

CVE-2026-41034

ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion via pictFmla.cbBufInCtlStm and other vectors, leading to an information leak and ASLR bypass...

5CVSS0.00295EPSS
SaveExploits0References1
OSV
OSV
added 2026/04/16 6:06 a.m.13 views

CVE-2026-41034

ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion via pictFmla.cbBufInCtlStm and other vectors, leading to an information leak and ASLR bypass...

5CVSS5.9AI score
SaveExploits0References3
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