CVE-2026-85604

Grav before 2.0.18 Remote Code Execution via sort filter

Published Sep 4, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Description

Grav before 2.0.18 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike |map/|filter/|reduce, |sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

getgrav

grav

unaffected

Version	Status	Constraints
`0`	affected	< 2.0.18
`2.0.18`	unaffected	—

No data.

Vendor Product Versions

Getgrav

Grav

Version	Status	Scheme	Platform
`[0,2.0.19)`	affected	semver	—
`2.0.19`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.859% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://github.com/getgrav/grav/security/advisories/GHSA-p6qj-p5m7-f62h
https://www.vulncheck.com/advisories/grav-before-2.0.19-remote-code-execution-via-sort-filter

History

Sep 8, 2026 5:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 5, 2026 10:30 AM Description updated. Title updated View changes

Type	Values Removed	Values Added
Description	Grav before 2.0.19 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike \|map/\|filter/\|reduce, \|sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.	Grav before 2.0.18 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike \|map/\|filter/\|reduce, \|sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.
Title	Grav before 2.0.19 Remote Code Execution via sort filter	Grav before 2.0.18 Remote Code Execution via sort filter

Sep 4, 2026 11:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Grav before 2.0.19 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike \|map/\|filter/\|reduce, \|sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.
Title		Grav before 2.0.19 Remote Code Execution via sort filter
First Time appeared		Getgrav Getgrav grav
Weaknesses		CWE-94
CPEs		cpe:2.3:a:getgrav:grav::::::::
Vendors & Products		Getgrav Getgrav grav
References		https://github.com/getgrav/grav/security/advisories/GHSA-p6qj-p5m7-f62h https://www.vulncheck.com/advisories/grav-before-2.0.19-remote-code-execution-via-sort-filter
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}`