TI-2026-29758 Aliases CVE-2026-41130 GHSA-95wr-3f2v-v2wh

Craft CMS has a host header injection leading to SSRF via resource-js endpoint

MEDIUM 64CWE-918Published 2026-04-21 · Updated 2026-04-22

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Craft CMS is a content management system (CMS). In versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14, the `resource-js` endpoint in Craft CMS allows unauthenticated requests to proxy remote JavaScript resources. When `trustedHosts` is not explicitly restricted (default configuration), the application trusts the client-supplied Host header. This allows an attacker to control the derived `baseUrl`, which is used in prefix validation inside `actionResourceJs()`. By supplying a malicious Host header, the attacker can make the server issue arbitrary HTTP requests, leading to Server-Side Request Forgery (SSRF). Versions 4.17.9 and 5.9.15 patch the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00329 26th percentileScored 2026-11-07

Fix Fixed cms (craftcms): 5.9.15, 4.17.9craftcms/cms (Packagist): 5.9.15, 4.17.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
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	5.0.0-RC1 to before 5.9.15; 4.0.0-RC1 to before 4.17.9	5.9.15, 4.17.9	Patch available	CNA
—	craftcms/cms (Packagist)	5.0.0-RC1 to before 5.9.15	5.9.15	Patch available	GHSA-95wr-3f2v-v2wh
—	craftcms/cms (Packagist)	4.0.0-RC1 to before 4.17.9	4.17.9	Patch available	GHSA-95wr-3f2v-v2wh

cms VendorCraft CMS Affected 5.0.0-RC1 to before 5.9.15; 4.0.0-RC1 to before 4.17.9 Fixed in 5.9.15, 4.17.9 Patch available CNA
craftcms/cms (Packagist) Vendor— Affected 5.0.0-RC1 to before 5.9.15 Fixed in 5.9.15 Patch available GHSA-95wr-3f2v-v2wh
craftcms/cms (Packagist) Vendor— Affected 4.0.0-RC1 to before 4.17.9 Fixed in 4.17.9 Patch available GHSA-95wr-3f2v-v2wh

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 5.9.15, 4.17.9
Fix · GHSA-95wr-3f2v-v2wh craftcms/cms (Packagist) Fixed in 5.9.15 Advisory →
Fix · GHSA-95wr-3f2v-v2wh craftcms/cms (Packagist) Fixed in 4.17.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-41130
2026-10-03 Alias added: GHSA-95wr-3f2v-v2wh

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-41130

Other 3

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