CVE-2026-23491Public exploitNetwork attack vector

Unauthenticated file disclosure via unchecked download path

Published Feb 18, 2026 · Updated Feb 18, 2026

Path traversal in InvoicePlane 1.6.3 and earlier allows remote attackers to read arbitrary server files through a guest download URL. The Guest Get controller's get_file method URL-decodes an attacker-controlled filename, appends it to uploads/customer_files, and passes the unchecked path to readfile without rejecting ../ sequences. No account or user interaction is required; exposure is limited to files readable by the web server process, including application configuration and source code.

CVSS severity9.3
Critical
EPSS probability4.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in InvoicePlane 1.6.3 and earlier allows remote attackers to read arbitrary server files through a guest download URL. The Guest Get controller's get_file method URL-decodes an attacker-controlled filename, appends it to uploads/customer_files, and passes the unchecked path to readfile without rejecting ../ sequences. No account or user interaction is required; exposure is limited to files readable by the web server process, including application configuration and source code.

The record

CVE
CVE-2026-23491
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
InvoicePlane
Product
InvoicePlane
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=< 1.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

InvoicePlane · InvoicePlaneversion=< 1.6.4

Published CVSS scores

9.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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