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Full vulnerability report · 2026
CVE-2026-63277High confidence

RCE via calcext:data-mappings, sql provider and jdbc connector

The Document Foundation · LibreOffice

8.5HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.14% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs The Document Foundation LibreOffice and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelibreofficeVendor fix publishedDebian records a fixed source-package version for this release.4:25.2.3-2+deb13u8Debian Security Tracker ↗Source updated 8 Oct 2026
Debian bookwormbookworm · sourcelibreofficeAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 8 Oct 2026
Debian forkyforky · sourcelibreofficeVendor fix publishedDebian records a fixed source-package version for this release.4:26.2.5.2-1Debian Security Tracker ↗Source updated 8 Oct 2026
Debian sidsid · sourcelibreofficeVendor fix publishedDebian records a fixed source-package version for this release.4:26.2.5.2-1Debian Security Tracker ↗Source updated 8 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibreofficeUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 7 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

2 current
CVE-2026-63277 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-63277
509 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • libreoffice as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-base as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-base-drivers-postgresql as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-branding-upstream as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-calc as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-calc-extensions as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-draw as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-filters-optional as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-gnome as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-gtk3 as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-icon-themes as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-impress as component of SUSE Linux Enterprise Desktop 15 SP7
Summary
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.
Remediation
No remediation text is recorded.
CVE-2026-63277 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibreoffice: libreoffice: Arbitrary code execution via remote Java database driver
670 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • autocorr-af as a component of Red Hat Enterprise Linux 6
  • autocorr-bg as a component of Red Hat Enterprise Linux 6
  • autocorr-ca as a component of Red Hat Enterprise Linux 6
  • autocorr-cs as a component of Red Hat Enterprise Linux 6
  • autocorr-da as a component of Red Hat Enterprise Linux 6
  • autocorr-de as a component of Red Hat Enterprise Linux 6
  • autocorr-en as a component of Red Hat Enterprise Linux 6
  • autocorr-es as a component of Red Hat Enterprise Linux 6
  • autocorr-eu as a component of Red Hat Enterprise Linux 6
  • autocorr-fa as a component of Red Hat Enterprise Linux 6
  • autocorr-fi as a component of Red Hat Enterprise Linux 6
  • autocorr-fr as a component of Red Hat Enterprise Linux 6
Summary
A flaw was found in LibreOffice. When linking spreadsheet cell ranges to external data sources in Calc, a document can specify an external Java database driver. By convincing a user to open a specially crafted document, a remote attacker can force the application to download and execute untrusted Java code from a remote location, resulting in arbitrary code execution.
Remediation
Restricting the LibreOffice Java class path settings to local file system schemes (file:// URLs) prevents the execution of untrusted code from remote network locations. Alternatively, disabling the Java Runtime Environment (JRE) in LibreOffice options (Tools -> Options -> LibreOffice -> Advanced) eliminates the attack vector.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-92416

No EUVD known-exploited evidence

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.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
8.5 · CVSS 4.0
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

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.

What

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.

Why

The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

How

An attacker operating through local access may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

How

An attacker operating through local access may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Inclusion of Functionality from Untrusted Control Sphere → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Passive interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-829 ↗

CWE-829: Inclusion of Functionality from Untrusted Control Sphere. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-829
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-92416Official EUVD mapping

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.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3738LibreOffice: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in LibreOffice ausnutzen, um Informationen offenzulegen, Daten zu manipulieren und beliebigen Code auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20261007Security Bulletin 7 Oct 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 7 Oct 2026, published on 7 October 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1260Multiples vulnérabilités dans OpenOffice

De multiples vulnérabilités ont été découvertes dans OpenOffice. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance.

Official advisory ↗
CSIRT Italia · Italian · aggiornamenti-di-sicurezza-per-libreoffice-3Aggiornamenti di sicurezza per LibreOffice

Aggiornamenti di sicurezza per LibreOffice sanano 6 vulnerabilità, di cui 1 con gravità "alta" che interessa LibreOffice Calc, applicazione della suite open source dedicata alla gestione dei fogli di calcolo. Tale vulnerabilità, qualora sfruttata, potrebbe consentire ad un utente malintenzionato di eseguire codice arbitrario sui sistemi interessati.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
  • libreoffice as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-base as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-base-drivers-postgresql as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-branding-upstream as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-calc as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-calc-extensions as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-draw as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-filters-optional as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-gnome as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-gtk3 as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-icon-themes as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-impress as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-af as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-ar as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-as as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-bg as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-bn as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-br as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-ca as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-ckb as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-cs as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-cy as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-da as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-de as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-dz as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-el as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-en as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-eo as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-es as component of SUSE Linux Enterprise Desktop 15 SP7
  • libreoffice-l10n-et as component of SUSE Linux Enterprise Desktop 15 SP7
  • and 479 more
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 5 Oct 2026 · Last source change 5 Oct 2026, 12:43 UTC · CWE-829 · Inclusion of Functionality from Untrusted Control Sphere

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-10-06
European sourceENISA EUVD · EUVD-2026-92416
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2026-92416 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-92416"}
    ENISA EUVD ↗
  2. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-92416↗Vendor CSAF · SUSE Product Security Team↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-63277 · cve.blacktree.nl