CVE-2026-63267Network attack vectorHinoki check available

Local-file reads and GET requests via CSV links

Published Oct 5, 2026 · Updated Oct 5, 2026

External CSV links in LibreOffice Calc 26.2.0 through 26.2.4 let remote attackers trigger local-file reads via a crafted spreadsheet. The calcext:data-mappings CSV provider fetched document-specified file or HTTP URLs during loading without applying spreadsheet link-update controls. Opening the untrusted spreadsheet is required; local file contents enter the sheet, while HTTP links send GET requests to attacker-selected hosts.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

External CSV links in LibreOffice Calc 26.2.0 through 26.2.4 let remote attackers trigger local-file reads via a crafted spreadsheet. The calcext:data-mappings CSV provider fetched document-specified file or HTTP URLs during loading without applying spreadsheet link-update controls. Opening the untrusted spreadsheet is required; local file contents enter the sheet, while HTTP links send GET requests to attacker-selected hosts.

The record

CVE
CVE-2026-63267
Published
Oct 5, 2026
Updated
Oct 5, 2026
Vendor
The Document Foundation
Product
LibreOffice
Classifications
T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=26.2 << 26.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Document Foundation · LibreOfficeversion=26.2 << 26.2.5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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