CVE-2026-34367Public exploitNetwork attack vector

Authenticated SSRF via unsanitized invoice notes

Published Mar 31, 2026 · Updated Mar 31, 2026

SSRF in InvoiceShelf before 2.2.0 allows remote authenticated users to make server-side requests through invoice PDF rendering. Invoice Notes HTML is inserted unescaped into Blade templates, and Dompdf dereferences attacker-controlled image and link URLs. Company-level invoice access is required; requests can reach internal services or cloud metadata, while file reads and code execution require permissive Dompdf settings.

CVSS severity7.6
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in InvoiceShelf before 2.2.0 allows remote authenticated users to make server-side requests through invoice PDF rendering. Invoice Notes HTML is inserted unescaped into Blade templates, and Dompdf dereferences attacker-controlled image and link URLs. Company-level invoice access is required; requests can reach internal services or cloud metadata, while file reads and code execution require permissive Dompdf settings.

The record

CVE
CVE-2026-34367
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
InvoiceShelf
Product
InvoiceShelf
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

InvoiceShelf · InvoiceShelfversion=< 2.2.0

Published CVSS scores

8.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
7.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo