{"answers":{"affected":"2 open source packages ship an affected version, including io.unitycatalog:unitycatalog-server. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27478 in the wild and no public exploit code.","fix":"Upgrade io.unitycatalog:unitycatalog-server to 0.4.1 or later.","what":"CVE-2026-27478 is a critical authentication bypass vulnerability in unitycatalog, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27478 and fix it if it is affected.\n\nWhat it is: CVE-2026-27478 is a critical authentication bypass vulnerability in unitycatalog, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-27478 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.unitycatalog:unitycatalog-server (Maven): affected all versions; fixed in 0.4.1\n- io.unitycatalog:unitycatalog-server (Maven): affected all versions; fixed in 0.4.1\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-2026-27478/ (Markdown: https://insights.sbomify.com/CVE-2026-27478/index.md)","id":"CVE-2026-27478","markdown":"https://insights.sbomify.com/CVE-2026-27478/index.md","name":"CVE-2026-27478","record":{"aliases":["GHSA-qqcj-rghw-829x"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Unity Catalog","requires_auth":"none","summary":"Attackers can impersonate any user by bypassing JWT issuer validation in Unity Catalog's token exchange endpoint, leading to complete account takeover.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"unitycatalog","vendor":"unitycatalog"}],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"},{"id":"CWE-290","name":"Authentication Bypass by Spoofing"},{"id":"CWE-1390","name":"Weak Authentication"}],"description":"Unity Catalog is an open, multi-modal Catalog for data and AI. In 0.4.0 and earlier, a critical authentication bypass vulnerability exists in the Unity Catalog token exchange endpoint (/api/1.0/unity-control/auth/tokens). The endpoint extracts the issuer (iss) claim from incoming JWTs and uses it to dynamically fetch the JWKS endpoint for signature validation without validating that the issuer is a trusted identity provider.","ecosystems":["Maven"],"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":"Unity Catalog has a JWT Issuer Validation Bypass Allows Complete User Impersonation","id":"CVE-2026-27478","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Wallos: SSRF via Redirect Bypass in Logo/Icon URL Fetch","id":"CVE-2026-27479"},"packages":[{"ecosystem":"Maven","fixed":["0.4.1"],"introduced":["0"],"last_affected":[],"package":"io.unitycatalog:unitycatalog-server","purl":null,"source":"GHSA-qqcj-rghw-829x"},{"ecosystem":"Maven","fixed":["0.4.1"],"introduced":["0"],"last_affected":[],"package":"io.unitycatalog:unitycatalog-server","purl":"pkg:maven/io.unitycatalog/unitycatalog-server","source":"GHSA-qqcj-rghw-829x"}],"prev":{"headline":"Mastodon has SSRF via unvalidated FASP Provider base_url","id":"CVE-2026-27477"},"products":["unitycatalog"],"published":"2026-03-11","related":[],"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":"2026-03-12","vendors":["unitycatalog"]},"summary":"Attackers can impersonate any user by bypassing JWT issuer validation in Unity Catalog's token exchange endpoint, leading to complete account takeover.","url":"https://insights.sbomify.com/CVE-2026-27478/"}