{"answers":{"affected":"4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27127 exists.","fix":"Upgrade craftcms/cms to a fixed version for your release line: 4.16.19 or 5.8.23.","what":"CVE-2026-27127 is a high-severity server-side request forgery vulnerability in Craftcms Craft Cms, published on 24 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27127 and fix it if it is affected.\n\nWhat it is: CVE-2026-27127 is a high-severity server-side request forgery vulnerability in Craftcms Craft Cms, published on 24 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27127 exists.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected from 3.5.0; fixed in 4.16.19\n- craftcms/cms (Packagist): affected from 3.5.0; fixed in 4.16.19\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.23\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.23\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-27127/ (Markdown: https://insights.sbomify.com/CVE-2026-27127/index.md)","id":"CVE-2026-27127","markdown":"https://insights.sbomify.com/CVE-2026-27127/index.md","name":"CVE-2026-27127","record":{"aliases":["GHSA-gp2f-7wcm-5fhx"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Craft CMS","requires_auth":"low_privilege","summary":"Authenticated users with specific GraphQL permissions can bypass SSRF protections via DNS rebinding to access internal network resources.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"craft_cms","vendor":"craftcms"}],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"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 rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to all blocked IPs, not just IPv6 endpoints. Exploitation requires GraphQL schema permissions for editing assets in the `\u003cVolumeName\u003e` volume and creating assets in the `\u003cVolumeName\u003e` volume. These permissions may be granted to authenticated users with appropriate GraphQL schema access and/or Public Schema (if misconfigured with write permissions). Versions 4.16.19 and 5.8.23 patch the issue.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding","id":"CVE-2026-27127","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"craftcms:craft_cms","products":["craftcms:craft_cms"],"type":"ssrf","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Craft CMS's race condition in Token Service potentially allows for token usage greater than the token limit","id":"CVE-2026-27128"},"packages":[{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["3.5.0"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-gp2f-7wcm-5fhx"},{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["3.5.0"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-gp2f-7wcm-5fhx"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-gp2f-7wcm-5fhx"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-gp2f-7wcm-5fhx"}],"prev":{"headline":"Craft CMS has Stored XSS in Table Field via \"HTML\" Column Type","id":"CVE-2026-27126"},"products":["cms"],"published":"2026-02-24","related":[{"cvss_score":10,"headline":"Craft CMS Code Injection","id":"CVE-2025-32432","kev_date_added":"2026-03-20","published":"2025-04-25"},{"cvss_score":9.3,"headline":"Craft CMS Code Injection","id":"CVE-2024-56145","kev_date_added":"2025-06-02","published":"2024-12-18"},{"cvss_score":8.1,"headline":"Craft CMS Code Injection","id":"CVE-2025-23209","kev_date_added":"2025-02-20","published":"2025-01-18"},{"cvss_score":6.9,"headline":"Craft CMS External Control of Assumed-Immutable Web Parameter","id":"CVE-2025-35939","kev_date_added":"2025-06-02","published":"2025-05-07"},{"cvss_score":10,"headline":"Craft CMS Remote Code Execution vulnerability","id":"CVE-2023-41892","kev_date_added":null,"published":"2023-09-13"},{"cvss_score":9.8,"headline":"Craft CMS Remote Code Injection","id":"CVE-2021-27903","kev_date_added":null,"published":"2021-06-30"},{"cvss_score":9.8,"headline":"SEOmatic for CraftCMS allows Server-Side Template Injection","id":"CVE-2020-9757","kev_date_added":null,"published":"2020-03-04"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-28","vendors":["craftcms"]},"summary":"Authenticated users with specific GraphQL permissions can bypass SSRF protections via DNS rebinding to access internal network resources.","url":"https://insights.sbomify.com/CVE-2026-27127/"}