TI-2026-40754 Aliases CVE-2026-56394 GHSA-c43v-4cr8-6mvp

Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

LOW 32CWE-22Published 2026-06-21 · Updated 2026-06-23

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files, allowing local file read access.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00493 42nd percentileScored 2026-11-07

Fix Fixed cms (craftcms): 4.17.7, 5.9.13craftcms/cms (Packagist): 4.17.7, 5.9.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Craft CMS	cms	4.0.0-RC1 to before 4.17.7; 5.0.0-RC1 to before 5.9.13	4.17.7, 5.9.13	Patch available	CNA
—	craftcms/cms (Packagist)	4.0.0-RC1 to before 4.17.7	4.17.7	Patch available	GHSA-c43v-4cr8-6mvp
—	craftcms/cms (Packagist)	5.0.0-RC1 to before 5.9.13	5.9.13	Patch available	GHSA-c43v-4cr8-6mvp

cms VendorCraft CMS Affected 4.0.0-RC1 to before 4.17.7; 5.0.0-RC1 to before 5.9.13 Fixed in 4.17.7, 5.9.13 Patch available CNA
craftcms/cms (Packagist) Vendor— Affected 4.0.0-RC1 to before 4.17.7 Fixed in 4.17.7 Patch available GHSA-c43v-4cr8-6mvp
craftcms/cms (Packagist) Vendor— Affected 5.0.0-RC1 to before 5.9.13 Fixed in 5.9.13 Patch available GHSA-c43v-4cr8-6mvp

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:craftcms:craft_cms::::::::	—	—	Craft CMS

cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions — — ·Craft CMS

Remediation

Fix · CNA cms (craftcms) Fixed in 4.17.7, 5.9.13
Fix · GHSA-c43v-4cr8-6mvp craftcms/cms (Packagist) Fixed in 4.17.7 Advisory →
Fix · GHSA-c43v-4cr8-6mvp craftcms/cms (Packagist) Fixed in 5.9.13 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-56394
2026-10-03 Alias added: GHSA-c43v-4cr8-6mvp

References

Patch 1

https://github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c

Advisory 2

Other 1

https://github.com/craftcms/cms

TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8

See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences