CVE-2026-78061Public exploitNetwork attack vector

Internal network access via unchecked IMAP destination

Published Aug 23, 2026 · Updated Aug 23, 2026

SSRF in vas3k TaxHacker 0.8.0 through 0.8.2 allows remote authenticated users to make server-side TCP connections via Email Sync. The addEmailServerAction path accepts unvalidated host and port values, and buildImapConfig passes them to imaps.connect for a TCP connection. A signed-in user with access to Email Sync can scan or reach internal services from the TaxHacker server's network position.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in vas3k TaxHacker 0.8.0 through 0.8.2 allows remote authenticated users to make server-side TCP connections via Email Sync. The addEmailServerAction path accepts unvalidated host and port values, and buildImapConfig passes them to imaps.connect for a TCP connection. A signed-in user with access to Email Sync can scan or reach internal services from the TaxHacker server's network position.

The record

CVE
CVE-2026-78061
Published
Aug 23, 2026
Updated
Aug 23, 2026
Vendor
vas3k
Product
TaxHacker
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

vas3k · TaxHackerversion=0.8.0; version=0.8.1; version=0.8.2

Published CVSS scores

6.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.5VulDBAV:N/AC:L/Au:S/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.

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)
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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