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CVE-2026-8357

Heap buffer overflow in Calc formula compilation

Published: Jun 15, 2026Updated: Jul 28, 2026 Sources: CVE List NVDCWE-193
7.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 94.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-193CWE-787CWE-131

Affected Products

The Document Foundation
oss-project·NLaka document foundation, tdf
LibreOfficeOn-premDesktop App
Consumer Software / productivity

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-8357
libreoffice.org
https://access.redhat.com/errata/RHSA-2026:35839
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:36832
access.redhat.com
and 10 more references View all →

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