Is CVE-2026-8358 in the CISA KEV catalog?

No. CVE-2026-8358 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8358?

CVE-2026-8358 has a CVSS v4 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-8358?

CVE-2026-8358 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8358?

Upgrade libreoffice on debian 12 to 4:7.4.7-1+deb12u13 or later.

CVE & CISA-KEV Catalog

CVE-2026-8358

MEDIUM

5.4

CVSS v4

NVD

Description

LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.

CWE-787Out-of-bounds Write CWE-843Type Confusion

How to fix

Remediation Available

libreofficeDebian

Fixed in:4:7.4.7-1+deb12u13CVE-2026-8358

Fixed in:4:25.2.3-2+deb13u5CVE-2026-8358

Fixed in:4:26.2.4.2-1CVE-2026-8358

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

CVSS v4 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

Impact

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Other references1

libreoffice.org

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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 2026-06-17.