CVE-2026-63270

Name	CVE-2026-63270
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6543-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libreoffice (PTS)	bookworm	4:7.4.7-1+deb12u14	vulnerable
	bookworm (security)	4:7.4.7-1+deb12u13	vulnerable
	trixie	4:25.2.3-2+deb13u6	vulnerable
	trixie (security)	4:25.2.3-2+deb13u8	fixed
	forky	4:26.8.0.3-2	fixed
	sid	4:26.8.1.1-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libreoffice	source	trixie	4:25.2.3-2+deb13u8		DSA-6543-1
libreoffice	source	(unstable)	4:26.2.5.2-1

https://www.libreoffice.org/security/#cve-2026-63270