Description
LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2 – < < 26.2.5 | < 26.2.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libreoffice | 4:26.2.5.2-1 | — |
| Debian 13 | libreoffice | 4:25.2.3-2+deb13u8 | — |
| Debian 12 | libreoffice | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libreoffice | No fix yet | — |
| Ubuntu 26.04 LTS | libreoffice | No fix yet | — |
| Ubuntu 24.04 LTS | libreoffice | No fix yet | — |
| Ubuntu 22.04 LTS | libreoffice | No fix yet | — |
| Ubuntu 20.04 LTS | libreoffice | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | autocorr-af +178 | 1:7.1.8.1-15.el9_8.3 | RHSA-2026:82013 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | autocorr-af +178 | 1:7.1.8.1-15.el9_8.3.alma.1 | ALSA-2026:82013 |
| AlmaLinux 8 | autocorr-af +172 | 1:7.1.8.1-3.el8_10.alma.1 | ALSA-2026:88164 |
| AlmaLinux 8 | flute | 1.3.0-19.OOo31.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libbase | 1.1.3-21.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libfonts | 1.1.3-23.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libformula +1 | 1.1.3-20.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | liblayout | 0.2.10-19.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libloader +1 | 1.1.3-19.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libserializer | 1.1.2-20.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | sac | 1.3-29.el8_10 | ALSA-2026:88164 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | autocorr-af +177 | 1:7.1.8.1-16.el9_9.1 | RLSA-2026:98491 |
| Rocky Linux 9 | libreoffice | 1:7.1.8.1-15.el9_8.3 | RLSA-2026:98491, RLSA-2026:82013 |
| Rocky Linux 8 | flute | 1.3.0-19.OOo31.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libbase | 1.1.3-21.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libfonts | 1.1.3-23.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libformula +1 | 1.1.3-20.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | liblayout | 0.2.10-19.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libloader +1 | 1.1.3-19.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libreoffice | 1:7.1.8.1-3.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libserializer | 1.1.2-20.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | RLSA-2026:88164 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | autocorr-af +178 | 1:7.1.8.1-15.0.1.el9_8.3 | ELSA-2026-82013 |
| Oracle Linux 8 | autocorr-af +172 | 1:7.1.8.1-3.0.1.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | flute | 1.3.0-19.OOo31.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libbase | 1.1.3-21.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libfonts | 1.1.3-23.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libformula +1 | 1.1.3-20.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | liblayout | 0.2.10-19.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libloader +1 | 1.1.3-19.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libserializer | 1.1.2-20.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | sac | 1.3-29.el8_10 | ELSA-2026-88164 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
HORKimhab/CVE-2026-63277 ★ 0 · Oct 6, 2026
CVE-2026-63277,
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 9
- RLSA-2026:98491 Important: libreoffice security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-3738 LibreOffice: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:82013 Important: libreoffice security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ELSA-2026-88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 27, 2026
- RLSA-2026:88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 23, 2026
- RHSA-2026:82013 Red Hat Security Advisory: libreoffice security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RLSA-2026:82013 Important: libreoffice security update Rocky Linux Security Advisories · Oct 14, 2026
- ELSA-2026-82013 Important: libreoffice security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 13, 2026