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CVE-2026-6040

29
FAUCET Score

A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.

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

Impacted Technologies

VendorProductVersion(s)CPE
The Document FoundationLibreOffice
>= 25.8, < < 25.8.7, >= 26.2, < < 26.2.3CNA 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
0.11%
Probability of exploitation in next 30 days
EPSS Percentile
1.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0011 is in the 8th percentile among its peer group of 759 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.2 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

access.redhat.com / security/cve/CVE-2026-6040
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-6040.json
libreoffice.org / about-us/security/advisories/cve-2026-6040