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CVE-2026-8358

23
FAUCET Score

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.

First published: Jun 15, 2026Last modified: Jun 16, 2026

Impacted Technologies

VendorProductVersion(s)CPE
The Document FoundationLibreOffice
>= 25.8, < < 25.8.7, >= 26.2, < < 26.2.4CNA affecteddefault unknown

CVSS Data

CVSS version used by this source: 4.0

5.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
VS Confidentiality
LOW
VS Integrity
LOW
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
6.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0017 is in the 9th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

ubuntupatch availablevia ubuntu_usn
Product: libreoffice (jammy)Fixed in: 1:7.3.7-0ubuntu0.22.04.12
ubuntupatch availablevia ubuntu_usn
Product: libreoffice (noble)Fixed in: 4:24.2.7-0ubuntu0.24.04.6
ubuntupatch availablevia ubuntu_usn
Product: libreoffice (resolute)Fixed in: 4:26.2.4.2-0ubuntu0.26.04.2

Vendor Advisories (1)

ubuntuUSN-8534-1

LibreOffice vulnerabilities

Jul 13, 2026

References

libreoffice.org / about-us/security/advisories/cve-2026-8358