CVE-2026-55385Public exploitNetwork attack vector

SSRF via unchecked PDF renderer host

Published Oct 14, 2026 · Updated Oct 14, 2026

SSRF in InvoiceShelf before 2.4.0 allows remote authenticated users to reach internal services through PDF generation. PDFConfigurationRequest.php checks gotenberg_host only for URL syntax, and GotenbergPDFDriver::loadView sends rendered document.html to that destination without rejecting private or reserved addresses. Owner-level access and the Gotenberg PDF driver are required; subsequent renders disclose customer and financial data to a configured external host, while internal access depends on server network reachability.

CVSS severity6.8
Medium
EPSS probability0.45%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in InvoiceShelf before 2.4.0 allows remote authenticated users to reach internal services through PDF generation. PDFConfigurationRequest.php checks gotenberg_host only for URL syntax, and GotenbergPDFDriver::loadView sends rendered document.html to that destination without rejecting private or reserved addresses. Owner-level access and the Gotenberg PDF driver are required; subsequent renders disclose customer and financial data to a configured external host, while internal access depends on server network reachability.

The record

CVE
CVE-2026-55385
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
InvoiceShelf
Product
InvoiceShelf
Classifications
CWE-918, T1048
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

InvoiceShelf · InvoiceShelfversion=< 2.4.0

Published CVSS scores

6.8InvoiceShelfCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1048Exfiltration Over Alternative Protocol

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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