CVE & CISA-KEV Catalog

CVE-2026-8357

HIGH
7.8
CVSS v3
NVD

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.

CWE-193CWE-787Out-of-bounds WriteCWE-131

How to fix

Remediation Available
libreofficeDebian
Fixed in:4:7.4.7-1+deb12u13CVE-2026-8357
Fixed in:4:25.2.3-2+deb13u5CVE-2026-8357
Fixed in:4:26.2.4.2-1CVE-2026-8357

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.14%probability of exploitation in 30 days
4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.