CVE-2026-112356

GFI KerioConnect < 10.0.9p2 XSS via Link Auto-Formatter

CVSS score

5.1

EPSS probability

—

Risk score

0.5

Published

2 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

GFI KerioConnect HTML Injection Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

GFI KerioConnect before 10.0.9 Patch 2 contains an HTML injection vulnerability within its link auto-formatter [S0]. Remote attackers can spoof link targets or inject arbitrary HTML into the rendered message within a victim's Webmail session [S0].

Why does it matter?

This flaw allows attackers to inject malicious markup within victim Webmail sessions, compromising message rendering and session integrity [S0].

What should be done?

Follow vendor advisory guidance [S0]

Chain of evidence and sources2 verified claims

GFI KerioConnect 10.0.9 Patch 2 öncesi sürümler bağlantı otomatik biçimlendiricisinde HTML enjeksiyonu barındırır [S0].

S0 · daybreach-canonical S1 · cvelist

Saldırganlar bu kusuru kurbanların Webmail oturumlarında bağlantı hedeflerini sahtekarlıkla değiştirmek için istismar edebilir [S0].

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

GFI KerioConnect (Kerio Connect) before 10.0.9 Patch 2 contains a cross-site scripting vulnerability in the Webmail component that allows a remote attacker to spoof link targets or inject HTML into a message as rendered in a victim's authenticated Webmail session by sending a crafted email whose text is already inside a link. Attackers can exploit the link auto-formatter's re-processing of already-linked text, using quote characters to break out of the href attribute and inject attacker-controlled markup to execute script in the victim's session.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CWE: CWE-79, CWE-83

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-112356 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	GFI USA, LLC	GFI KerioConnect	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
6.1	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	CVE CNA
6.1	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	NVD
5.1	CVSS V4_0	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	CVE CNA
5.1	CVSS V40	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

Release Notes

Open source

reference

Release Notes

Open source

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-112356 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CWE-83: Common Weakness Enumeration Entry CWE-83

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-112356 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

User—

Official Sources and Advisories

Release Notespatch VulnCheck Advisory: GFI KerioConnect < 10.0.9p2 HTML Injection via Link Auto-Formattervendor-advisory

CVSS Vector Radar Chart

5.1 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionA

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)A

Availability (Erişilebilirlik)None

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

GFI USA, LLC

Weakness Type (CWE & CAPEC)

CWE-79 CWE-83

Similar Vulnerabilities

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VendorGFI USA, LLC ProductGFI KerioConnect

Patch verified2 h ago

6.2

CVE-2026-112353GFI KerioConnect < 10.0.8p2 Stored XSS via SVG Attachment