CVE-2026-75574Public exploitNetwork attack vector

Authenticated command execution via unsandboxed Email Twig rendering

Published Aug 25, 2026 · Updated Aug 27, 2026

Server-side template injection in GetGrav Grav Email plugin before 4.2.2 allows remote authenticated users to execute operating-system commands. Email::processParams recursively passes page-controlled action strings to processTwigString, which registers an @EmailVar template and renders it outside Grav's sandbox. Accounts with api.access and api.pages.write can reach the sink without super-administrator, Twig-content, system-write, shell, root, or working-mail-server access.

CVSS severity8.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in GetGrav Grav Email plugin before 4.2.2 allows remote authenticated users to execute operating-system commands. Email::processParams recursively passes page-controlled action strings to processTwigString, which registers an @EmailVar template and renders it outside Grav's sandbox. Accounts with api.access and api.pages.write can reach the sink without super-administrator, Twig-content, system-write, shell, root, or working-mail-server access.

The record

CVE
CVE-2026-75574
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
GetGrav
Product
Grav
Classifications
CWE-1336, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <4.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GetGrav · Gravversion=0 <4.2.2

Published CVSS scores

8.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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-1336Improper Neutralization of Special Elements Used in a Template Engine
T1059Command and Scripting Interpreter

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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