{"answers":{"affected":"4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27129 in the wild and no public exploit code.","fix":"Upgrade craftcms/cms to a fixed version for your release line: 4.16.19 or 5.8.23.","what":"CVE-2026-27129 is a medium-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-2026-27129 and fix it if it is affected.\n\nWhat it is: CVE-2026-27129 is a medium-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: There is no known exploitation of CVE-2026-27129 in the wild and no public exploit code.\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-2026-27129/ (Markdown: https://insights.sbomify.com/CVE-2026-27129/index.md)","id":"CVE-2026-27129","markdown":"https://insights.sbomify.com/CVE-2026-27129/index.md","name":"CVE-2026-27129","record":{"aliases":["GHSA-v2gc-rm6g-wrw9"],"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 IPv6 resolution to access cloud metadata.","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":5.7,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"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 uses `gethostbyname()`, which only resolves IPv4 addresses. When a hostname has only AAAA (IPv6) records, the function returns the hostname string itself, causing the blocklist comparison to always fail and completely bypassing SSRF protection. This is a bypass of the security fix for CVE-2025-68437. 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":"none_known"},"has_fix":true,"headline":"Cloud Metadata SSRF Protection Bypass via IPv6 Resolution","id":"CVE-2026-27129","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":"Dokploy has Command Injection in its Service Operations","id":"CVE-2026-27130"},"packages":[{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["3.5.0"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-v2gc-rm6g-wrw9"},{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["3.5.0"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-v2gc-rm6g-wrw9"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-v2gc-rm6g-wrw9"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-v2gc-rm6g-wrw9"}],"prev":{"headline":"Craft CMS's race condition in Token Service potentially allows for token usage greater than the token limit","id":"CVE-2026-27128"},"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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-28","vendors":["craftcms"]},"summary":"Authenticated users with specific GraphQL permissions can bypass SSRF protections via IPv6 resolution to access cloud metadata.","url":"https://insights.sbomify.com/CVE-2026-27129/"}