{"answers":{"affected":"3 open source packages ship an affected version, including ormar. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27953 exists.","fix":"Upgrade ormar to 0.23.1 or later.","what":"CVE-2026-27953 is a high-severity vulnerability in ormar-orm ormar, published on 19 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27953 and fix it if it is affected.\n\nWhat it is: CVE-2026-27953 is a high-severity vulnerability in ormar-orm ormar, published on 19 Mar 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-2026-27953 exists.\n\nAffected packages and fixed versions:\n- ormar (PyPI): affected all versions; fixed in 0.23.1\n- ormar (PyPI): affected all versions; fixed in 0.23.1\n- ormar (PyPI): affected all versions; fixed in 0.23.1\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-2026-27953/ (Markdown: https://insights.sbomify.com/CVE-2026-27953/index.md)","id":"CVE-2026-27953","markdown":"https://insights.sbomify.com/CVE-2026-27953/index.md","name":"CVE-2026-27953","record":{"aliases":["DEBIAN-CVE-2026-27953","GHSA-f964-whrq-44h8","PYSEC-2026-2247","UBUNTU-CVE-2026-27953"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["privilege_escalation","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Python ORM library","requires_auth":"low_privilege","summary":"Attackers can bypass Pydantic validation in ormar ORM to inject unvalidated data or nullify fields, leading to privilege escalation and data integrity violations.","user_interaction":"not_required","vuln_class":"business_logic"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"ormar","vendor":"collerek"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-915","name":"Improperly Controlled Modification of Dynamically-Determined Object Attributes"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"ormar is a async mini ORM for Python. Versions 0.23.0 and below are vulnerable to Pydantic validation bypass through the model constructor, allowing any unauthenticated user to skip all field validation by injecting \"__pk_only__\": true into a JSON request body. By injecting \"__pk_only__\": true into a JSON request body, an unauthenticated attacker can skip all field validation and persist unvalidated data directly to the database. A secondary __excluded__ parameter injection uses the same pattern to selectively nullify arbitrary model fields (e.g., email or role) during construction. This affects ormar's canonical FastAPI integration pattern recommended in its official documentation, enabling privilege escalation, data integrity violations, and business logic bypass in any application using ormar.Model directly as a request body parameter. This issue has been fixed in version 0.23.1.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"ormar has a Pydantic Validation Bypass via Kwargs Injection in Model Constructor","id":"CVE-2026-27953","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"business_logic","year":"2026"},"n_packages":3,"n_references":9,"next":{"headline":"LiveHelperChat has department-level authorization bypass in holdaction, blockuser, and transferchat endpoints","id":"CVE-2026-27954"},"packages":[{"ecosystem":"PyPI","fixed":["0.23.1"],"introduced":["0"],"last_affected":[],"package":"ormar","purl":null,"source":"GHSA-f964-whrq-44h8"},{"ecosystem":"PyPI","fixed":["0.23.1"],"introduced":["0"],"last_affected":[],"package":"ormar","purl":"pkg:pypi/ormar","source":"GHSA-f964-whrq-44h8"},{"ecosystem":"PyPI","fixed":["0.23.1"],"introduced":["0"],"last_affected":[],"package":"ormar","purl":"pkg:pypi/ormar","source":"PYSEC-2026-2247"}],"prev":{"headline":"Agenta has Python Sandbox Escape, Leading to Remote Code Execution (RCE)","id":"CVE-2026-27952"},"products":["ormar"],"published":"2026-03-19","related":[{"cvss_score":9.8,"headline":"ormar is vulnerable to SQL Injection through aggregate functions min() and max()","id":"CVE-2026-26198","kev_date_added":null,"published":"2026-02-24"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-03-20","vendors":["ormar-orm"]},"summary":"Attackers can bypass Pydantic validation in ormar ORM to inject unvalidated data or nullify fields, leading to privilege escalation and data integrity violations.","url":"https://insights.sbomify.com/CVE-2026-27953/"}