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CVE.org (no NVD analysis yet)· CNA Document Fdn.

CVE-2026-63277: RCE via calcext:data-mappings, sql provider and jdbc connector

Noroxi assessment

Priority: Monitor (action score 34/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.34% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: The Document Foundation LibreOffice < 26.2.5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to The Document Foundation LibreOffice < 26.2.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 8.5 · v4.0—Proof of concept Fix available
Published
Oct 5, 2026
Updated
Oct 6, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Document Fdn.
8.5
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-63277

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Document Fdn.). Independent of NVD's CPE analysis and usually ahead of it.

  • The Document Foundation LibreOffice

    • 26.2 and later · before < 26.2.5affected · 26.2 series

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8autocorr-afbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-bgbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-cabefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-csbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-dabefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-debefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-elbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-enbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-esbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-fabefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-fibefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-frbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-gabefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-hrbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-hubefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-isbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-itbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-jabefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-kobefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-lbbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-ltbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-mnbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-nlbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1
AlmaLinux:8autocorr-plbefore 1:7.1.8.1-3.el8_10.alma.11:7.1.8.1-3.el8_10.alma.1

+96

Same product

the document foundation: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-63266Arbitrary file write via calcext:data-mappings, sql provider and Firebird backup functionality
    27Monitor
  • CVE-2026-63270Environment/ini-file leaks
    26Monitor
  • CVE-2026-63269LFI and GET SSRF via GStreamer and HLS playlists
    26Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-63279Sep 22, 2026 · Out of bounds read in PICT image import
    21Monitor
  • ← EarlierCVE-2026-63267Oct 5, 2026 · LFI and GET SSRF via calcext:data-mappings and csv provider
    26Monitor
  • ← EarlierCVE-2026-63268Oct 5, 2026 · LFI via calcext:data-mappings, sql provider and sdbc:flat:file:// db href
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
The Document Foundation LibreOffice< 26.2.5Vendor (CNA)
almalinux:autocorr-af1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-bg1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-ca1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-cs1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-da1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-de1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-dsb1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-el1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-en1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-es1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-fa1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:autocorr-fi1:7.1.8.1-15.el9_8.3.alma.1 · AlmaLinux:9Package registry (OSV)
debian:libreoffice4:25.2.3-2+deb13u8 · Debian:13Package registry (OSV)
red hat:autocorr-af1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-bg1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-ca1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-cs1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-da1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-de1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-dsb1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-el1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-en1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-es1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-fa1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:autocorr-fi1:7.1.8.1-15.el9_8.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:flute0:1.3.0-19.OOo31.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:libbase0:1.1.3-21.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:libfonts0:1.1.3-23.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:libformula0:1.1.3-20.el8_10 · Rocky Linux:8Package registry (OSV)

+7

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-10-06

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. First PoCsame day
  4. TodayNov 5, 2026+31 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-829 · Inclusion of Functionality from Untrusted Control Sphere

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Exploit maturitynone → poc
  2. SSVC exploitation— → none
  3. Exploit maturity— → none
  4. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records