CVE-2026-27129

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses gethostbyname, which only resolves IPv4 addresses. When a hostname has only AAAA IPv6 records, the function returns the...

CVE-2026-27127

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

Server-side Request Forgery (SSRF)

Overview craftcms/cms is a content management system. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the gethostbyname function used during GraphQL Asset mutation processing. An attacker can access internal cloud metadata endpoints by supplying hostnames...

CVE-2026-27129

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses gethostbyname, which only resolves IPv4 addresses. When a hostname has only AAAA IPv6 records, the function returns the...

CVE-2026-27127

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

CVE-2026-27129

CVE-2026-27129 affects Craft CMS, where the SSRF protection in the GraphQL Asset mutation (versions 4.5.0-RC1–4.16.18 and 5.0.0-RC1–5.8.22) is bypassed due to using gethostbyname(), which only resolves IPv4. If a host has only IPv6 (AAAA) records, the function returns the hostname, causing blockl...

CVE-2026-27129 Cloud Metadata SSRF Protection Bypass via IPv6 Resolution

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses gethostbyname, which only resolves IPv4 addresses. When a hostname has only AAAA IPv6 records, the function returns the...

CVE-2026-27129 Cloud Metadata SSRF Protection Bypass via IPv6 Resolution

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses gethostbyname, which only resolves IPv4 addresses. When a hostname has only AAAA IPv6 records, the function returns the...

CVE-2026-27129

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses gethostbyname, which only resolves IPv4 addresses. When a hostname has only AAAA IPv6 records, the function returns the...

CVE-2026-27127

CVE-2026-27127 affects Craft CMS (versions 4.5.0-RC1–4.16.18 and 5.0.0-RC1–5.8.22). It exploits a TOCTOU DNS rebinding flaw in the GraphQL Asset mutation where DNS resolution occurs separately from the HTTP request, bypassing prior fixes for CVE-2025-68437 and allowing access to blocked IPs. Expl...

CVE-2026-27127 Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

CVE-2026-27127 Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

CVE-2026-27127

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

CVE-2026-27127 Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Craft is a content management system CMS. In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebindi...

Craft CMS 代码问题漏洞

Craft CMS is an open-source content management system developed by Craft CMS. There are code vulnerabilities in versions 4.5.0-RC1 to 4.16.18, and from 5.0.0-RC1 to 5.8.22 of Craft CMS. These vulnerabilities stem from a GraphQL Asset mutation where the SSRF validation only parses IPv4 addresses,...

Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Summary The SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to t...

GHSA-GP2F-7WCM-5FHX Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Summary The SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use TOCTOU vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to t...

Craft CMS: GraphQL Asset Mutation Privilege Escalation

There is a Privilege Escalation vulnerability in Craft CMS’s GraphQL API that allows an authenticated user with write access to one asset volume to escalate their privileges and modify/transfer assets belonging to any other volume, including restricted or private volumes to which they should not...

GHSA-M5R2-8P9X-HP5M Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via Alternative IP Notation

I observed a recent commit intended to mitigate Server-Side Request Forgery SSRF vulnerabilities. While the implemented defense mechanisms are an improvement, I have identified two methods to bypass these protections. This report details the first bypass method involving alternative IP notation,...

CVE-2026-25497

CVE-2026-25497 : Privilege escalation in Craft CMS GraphQL API affecting versions 4.0.0-RC1 through before 4.17.0-beta.1 and 5.9.0-beta.1. An authenticated user with write access to one asset volume can escalate privileges and modify/transfer assets across volumes, including private or restricted...