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Cachet EUVDEUVD-2026-55800

| CVE-2026-69118 HIGH
Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)
2026-08-10 VulnCheck GHSA-9qx4-4584-p9h2
PHP Ssti RCE Cachet
8.7
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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
vuln.today AI
8.8 HIGH

Network vector, low complexity; low-privilege auth required; execution stays within web server process so no scope change; full C/I/A impact confirmed by RCE capability.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Aug 10, 2026 - 20:21 vuln.today
CVE Published
Aug 10, 2026 - 19:42 cve.org
HIGH 8.7

DescriptionCVE.org

Cachet through 2.4.1 contains a server-side template injection vulnerability in incident template rendering that allows authenticated users to execute arbitrary PHP code. Attackers can create malicious incident templates with Blade directives or Twig filters that execute system commands when incidents are created, achieving remote code execution as the web server process.

Articles & Coverage 1

News 6 New PHP Vulnerabilities - 3 Critical, 2 With POC Aug 11, 2026

AnalysisAI

Remote code execution in Cachet through version 2.4.1 allows authenticated low-privilege users to inject Blade directives or Twig-style filters into incident templates, which are interpreted and executed as arbitrary PHP by the server when incidents are rendered. Any account with permission to create or edit incident templates can run OS commands as the web server process, yielding full compromise of the hosting environment. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege Cachet credentials
Delivery
Access incident template editor
Exploit
Inject malicious Blade PHP directive into template
Execution
Trigger incident creation or preview using poisoned template
Persist
PHP interpreter executes injected directive
Impact
Achieve arbitrary OS command execution as web server process
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid, authenticated Cachet user account with permission to create or edit incident templates, corresponding to PR:L in the CVSS vector - any team member role that grants template editing access is sufficient. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.7 with vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H reflects network-accessible exploitation at low complexity, with low-privilege authentication as the sole access barrier - a meaningful but surmountable control. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a low-privilege Cachet account - such as a team member invited to manage incidents - navigates to the incident template editor and creates a template embedding a Blade directive such as @php system($_GET['cmd']); @endphp. When any incident is subsequently created or previewed using that template, the PHP interpreter executes the injected command as the web server process, granting the attacker arbitrary OS-level code execution. …
Remediation No vendor-released patched version has been independently confirmed at time of analysis; the available references point only to a GitHub issue (https://github.com/cachethq/cachet/issues/4621) and the VulnCheck advisory (https://www.vulncheck.com/advisories/cachet-authenticated-server-side-template-injection-rce) rather than a tagged release or security bulletin. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: audit Cachet user accounts and revoke template-editing permissions from all non-essential users; disable Cachet access if possible pending mitigation. …

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EUVD-2026-55800 vulnerability details – vuln.today
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