CVE-2026-55381Public exploitNetwork attack vector

Cross-company disclosure via unchecked estimate conversion

Published Oct 14, 2026 · Updated Oct 14, 2026

IDOR in InvoiceShelf before 2.4.0 allows remote authenticated users to read other companies' estimates via invoice conversion. ConvertEstimateController checks invoice-creation permission but not access to the route-bound Estimate, copying its financial and customer data across company boundaries. Access requires create-invoice permission and a victim estimate on the same instance; a non-default victim conversion action also changes or deletes the original estimate.

CVSS severity7.1
High
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in InvoiceShelf before 2.4.0 allows remote authenticated users to read other companies' estimates via invoice conversion. ConvertEstimateController checks invoice-creation permission but not access to the route-bound Estimate, copying its financial and customer data across company boundaries. Access requires create-invoice permission and a victim estimate on the same instance; a non-default victim conversion action also changes or deletes the original estimate.

The record

CVE
CVE-2026-55381
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
InvoiceShelf
Product
InvoiceShelf
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=< 2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

InvoiceShelf · InvoiceShelfversion=< 2.4.0

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

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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