CVE-2026-83577.8HighCWE-787

CVE-2026-8357: Heap buffer overflow in Calc formula compilation

The Document Foundation · LibreOffice

Vendor fix available · Affected: The Document Foundation LibreOffice · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

12th percentile

050100

Higher than 12% of scored CVEs

7.8HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

The Document Foundation · LibreOfficefrom 26.2 before < 26.2.4

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Out-of-bounds Write · Memory Corruption
Vendor: The Document Foundation
Published: June 2026
Band: Unlikely (under 1%), June 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-8357 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.

References

1 more reference is in the CVE record.