TI-2026-67609 Aliases CVE-2026-63270 GHSA-p537-j8hg-x628

Environment and INI file values leak through LibreOffice documents

LOW 28CWE-200Published 2026-10-05 · Updated 2026-10-05

Key facts

Attack vector: Local
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

LibreOffice from 26.2 before 26.2.5 expands environment variable and INI file values taken from URLs in a document. The URL checks miss some places where a document can supply a URL, which exposes sensitive information (CWE-200). If a user opens a crafted document, an attacker can have those values sent to a remote server.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

URLs could be constructed which expanded environment variable or INI file values, so potentially sensitive information could be exfiltrated to a remote server on opening a document containing such links. The check added for CVE-2024-12426 did not cover every place a document can supply a URL. XForms instance data and the Calc csv and sql data providers still reached the expansion. In fixed versions these places refuse URLs with internal schemes when the URL comes from the document.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00116 1st percentileScored 2026-11-07

Fix Partial LibreOffice (The Document Foundation): < 26.2.5Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
The Document Foundation	LibreOffice	26.2 to before < 26.2.5	< 26.2.5	Patch available	CNA

LibreOffice VendorThe Document Foundation Affected 26.2 to before < 26.2.5 Fixed in < 26.2.5 Patch available CNA

Remediation

Update LibreOffice to version 26.2.5 or later. Red Hat Enterprise Linux 6 has no fix planned, and Red Hat Enterprise Linux 7, 8 and 9 have no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA LibreOffice (The Document Foundation) Fixed in < 26.2.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-05
The Document Foundation LibreOffice < 26.2.5
6 records Highest priority Priority LOW 6 LOW
Other records, highest priority first
- TI-2026-67610 Remote code execution in LibreOffice Calc via external data linksPriority LOW 39
- TI-2026-67605 Arbitrary file write via LibreOffice Calc data mappingsPriority LOW 29
- TI-2026-67608 Local file read and SSRF in LibreOffice via HLS playlistsPriority LOW 28
Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-05 Threatist record created from CVE-2026-63270
2026-10-05 Alias added: GHSA-p537-j8hg-x628
2026-10-07 Affected versions changed · Red Hat
2026-10-07 CVSS score added · Red Hat

References

Other 1

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63270

TI-2019-07233 LibreLogo global-event script execution CVSS 3.1CRITICAL 9.8
TI-2018-12068 Path traversal in [UNKNOWN] libreoffice CVSS 3.0CRITICAL 9.8
TI-2018-07474 An information disclosure vulnerability occurs when LibreOffice 6.0.3 and Apache… CVSS 3.0HIGH 7.5
TI-2019-07230 Code injection in Document Foundation LibreOffice CVSS 3.1CRITICAL 9.8
TI-2018-05018 LibreOffice before 5.4.5 and 6.x before 6.0.1 allows remote attackers to read arbitrary… CVSS 3.0CRITICAL 9.8
TI-2023-01118 Arbitrary file write in libreoffice CVSS 3.1MEDIUM 5.5

See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences