CVE-2026-8357

LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.libreoffice.org/about-us/security/advisories/cve-2026-8357
https://access.redhat.com/errata/RHSA-2026:35839
https://access.redhat.com/errata/RHSA-2026:36832
https://access.redhat.com/errata/RHSA-2026:43423
https://access.redhat.com/errata/RHSA-2026:43424
https://access.redhat.com/errata/RHSA-2026:43425
https://access.redhat.com/errata/RHSA-2026:43460
https://access.redhat.com/errata/RHSA-2026:43461
https://access.redhat.com/errata/RHSA-2026:46386
https://access.redhat.com/errata/RHSA-2026:46387
https://access.redhat.com/security/cve/CVE-2026-8357
https://bugzilla.redhat.com/show_bug.cgi?id=2488964
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8357.json

Configurations

No configuration.

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) LibreOffice Calc compila las fórmulas de celda al abrir una hoja de cálculo. Existía un desbordamiento de búfer de montón al compilar una fórmula muy larga compuesta por muchos tokens de apertura. El array que rastrea la profundidad de anidamiento fue asignado con un elemento demasiado pequeño para ese peor caso, por lo que dicha fórmula escribió un elemento más allá de su final. En versiones corregidas, el array se dimensiona para contener el anidamiento más grande posible.

Information

Published : 2026-06-15 18:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-8357

Mitre link : CVE-2026-8357

CVE.ORG link : CVE-2026-8357

JSON object : View

Products Affected

No product.

CWE

CWE-193

Off-by-one Error

CWE-787

Out-of-bounds Write

CWE-131

Incorrect Calculation of Buffer Size

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"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:36832", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:43423", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:43424", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:43425", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:43460", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:43461", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46386", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:46387", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-8357", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488964", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8357.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security@documentfoundation.org", "description": [{"lang": "en", "value": "CWE-193"}, {"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-131"}]}], "descriptions": [{"lang": "en", "value": "LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting."}, {"lang": "es", "value": "LibreOffice Calc compila las f\u00f3rmulas de celda al abrir una hoja de c\u00e1lculo. Exist\u00eda un desbordamiento de b\u00fafer de mont\u00f3n al compilar una f\u00f3rmula muy larga compuesta por muchos tokens de apertura. El array que rastrea la profundidad de anidamiento fue asignado con un elemento demasiado peque\u00f1o para ese peor caso, por lo que dicha f\u00f3rmula escribi\u00f3 un elemento m\u00e1s all\u00e1 de su final. En versiones corregidas, el array se dimensiona para contener el anidamiento m\u00e1s grande posible."}], "lastModified": "2026-10-25T23:10:00.167", "sourceIdentifier": "security@documentfoundation.org"}