An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00155.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Libxls Subscribe
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No data.

No data.

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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/libxls/libxls/issues/162 cve-icon cve-icon cve-icon
https://github.com/libxls/libxls/pull/165/changes/6eed8bc1d51d6649faebab0184b21ab8768d8fa6 cve-icon cve-icon
History

Fri, 11 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 11 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Fri, 11 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Libxls
Libxls libxls
Vendors & Products Libxls
Libxls libxls

Thu, 10 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Read in libxls 1.6.3 xls_dumpSummary Function
Weaknesses CWE-125
CWE-20

Thu, 10 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Description An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-11T14:58:33.514Z

Reserved: 2026-08-25T00:00:00.000Z

Link: CVE-2026-79592

cve-icon Vulnrichment

Updated: 2026-09-11T14:58:24.709Z

cve-icon NVD

Status : Received

Published: 2026-09-10T21:17:47.047

Modified: 2026-09-11T15:17:04.623

Link: CVE-2026-79592

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T13:00:14Z

Weaknesses