CVE-2026-94039Public exploitNetwork attack vector

Internal resource access via unsanitized invoice logo URL

Published Sep 20, 2026 · Updated Sep 20, 2026

SSRF in the invoice PDF renderer in vas3k TaxHacker 0.8.0 through 0.8.5 allows remote attackers to access internal resources. The unauthenticated generateInvoicePDF Server Action passes businessLogo unchanged to @react-pdf/renderer, which fetches arbitrary HTTP or HTTPS URLs and embeds image responses in the returned PDF. The public route and deterministic action identifier make no session necessary; exposure is bounded to resources the server can reach and content the renderer accepts.

CVSS severity6.9
Medium
EPSS probability0.50%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the invoice PDF renderer in vas3k TaxHacker 0.8.0 through 0.8.5 allows remote attackers to access internal resources. The unauthenticated generateInvoicePDF Server Action passes businessLogo unchanged to @react-pdf/renderer, which fetches arbitrary HTTP or HTTPS URLs and embeds image responses in the returned PDF. The public route and deterministic action identifier make no session necessary; exposure is bounded to resources the server can reach and content the renderer accepts.

The record

CVE
CVE-2026-94039
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
vas3k
Product
TaxHacker
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=0.8.0
  2. Affected versionversion=0.8.1
  3. Affected versionversion=0.8.2
  4. Affected versionversion=0.8.3
  5. Affected versionversion=0.8.4
  6. Affected versionversion=0.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vas3k · TaxHackerversion=0.8.0; version=0.8.1; version=0.8.2; version=0.8.3; version=0.8.4; version=0.8.5

Published CVSS scores

6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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