CVE-2026-63278: medium-severity vulnerability in The Document Foundation LibreOffice
Package URLs can be used to exfiltrate arbitrary INI file values and environment variables
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.7epss 0.1%
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 recognise every way of naming the package content provider, so a URL that named it differently still reached the expansion. In fixed versions the package content provider is matched when the URL is checked.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Affected products
The Document Foundation · LibreOfficeRelated CVEs — The Document Foundation LibreOffice
In the same product, most dangerous first.
CVE-2022-3140—Macro URL arbitrary script executionEPSS 7.0%CVE-2021-25631—denylist of executable filename extensions possible to bypass under windowsEPSS 5.0%CVE-2023-2255—Remote documents loaded without prompt via IFrameEPSS 2.2%CVE-2020-12802—remote graphics contained in docx format retrieved in 'stealth mode'EPSS 2.0%CVE-2020-12803—XForms submissions could overwrite local filesEPSS 1.8%CVE-2022-26307—Weak Master KeysEPSS 1.5%