{"answers":{"affected":"3 open source packages ship an affected version, including langflow. It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2026-55255 in the wild since at least 7 Jul 2026.","fix":"Upgrade langflow to a fixed version for your release line: 1.9.1 or 1.9.2. US federal agencies must fix it by 10 Jul 2026.","what":"CVE-2026-55255 is a high-severity missing authorization vulnerability in Langflow Langflow, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-55255 and fix it if it is affected.\n\nWhat it is: CVE-2026-55255 is a high-severity missing authorization vulnerability in Langflow Langflow, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-55255 in the wild since at least 7 Jul 2026.\n\nAffected packages and fixed versions:\n- langflow (PyPI): affected all versions; fixed in 1.9.1\n- langflow (PyPI): affected all versions; fixed in 1.9.1\n- langflow (PyPI): affected all versions; fixed in 1.9.2\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-2026-55255/ (Markdown: https://insights.sbomify.com/CVE-2026-55255/index.md)","id":"CVE-2026-55255","markdown":"https://insights.sbomify.com/CVE-2026-55255/index.md","name":"CVE-2026-55255","record":{"aliases":["GHSA-qrpv-q767-xqq2","PYSEC-2026-221","ROOT-APP-PYPI-CVE-2026-55255"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"AI workflow builder","requires_auth":"low_privilege","summary":"Authenticated attackers can access and execute other users' AI workflows by manipulating flow IDs in API requests.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"langflow","vendor":"langflow"}],"cvss":{"score":8.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":"2026-06-30","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-30T14:49:22Z","kind":"github_poc","ref":"https://github.com/rootdirective-sec/CVE-2026-55255-Lab","stars":0,"title":null}],"tier":"exploited"},"has_fix":true,"headline":"Langflow Authorization Bypass Through User-Controlled Key","id":"CVE-2026-55255","indexable":true,"kev":{"dateAdded":"2026-07-07","dueDate":"2026-07-10","knownRansomwareCampaignUse":"Unknown","product":"Langflow","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","vendorProject":"Langflow","vulnerabilityName":"Langflow Authorization Bypass Through User-Controlled Key Vulnerability"},"kind":"cve","links":{"ecosystem":"PyPI","product":"langflow:langflow","products":["langflow:langflow"],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Denial of service in Android","id":"CVE-2026-55256"},"packages":[{"ecosystem":"PyPI","fixed":["1.9.1"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":null,"source":"GHSA-qrpv-q767-xqq2"},{"ecosystem":"PyPI","fixed":["1.9.1"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":"pkg:pypi/langflow","source":"GHSA-qrpv-q767-xqq2"},{"ecosystem":"PyPI","fixed":["1.9.2"],"introduced":["0"],"last_affected":[],"package":"langflow","purl":"pkg:pypi/langflow","source":"PYSEC-2026-221"}],"prev":{"headline":"NCalc: Denial of Service via Unbounded and Non-Terminating Factorial Evaluation","id":"CVE-2026-55254"},"products":["langflow"],"published":"2026-06-23","related":[{"cvss_score":9.8,"headline":"IBM Langflow Code Injection","id":"CVE-2026-9198","kev_date_added":"2026-08-04","published":"2026-07-17"},{"cvss_score":9.8,"headline":"Langflow Inclusion of Functionality from Untrusted Control Sphere","id":"CVE-2026-0770","kev_date_added":"2026-07-21","published":"2026-01-23"},{"cvss_score":9.8,"headline":"Langflow Missing Authentication","id":"CVE-2025-3248","kev_date_added":"2025-05-05","published":"2025-04-07"},{"cvss_score":9.4,"headline":"Langflow Origin Validation Error","id":"CVE-2025-34291","kev_date_added":"2026-05-21","published":"2025-12-05"},{"cvss_score":9.3,"headline":"Langflow Code Injection","id":"CVE-2026-33017","kev_date_added":"2026-03-25","published":"2026-03-20"},{"cvss_score":10,"headline":"Unauthenticated Server-Side RCE via PythonCodeStructuredTool in Public Flows","id":"CVE-2026-10134","kev_date_added":null,"published":"2026-06-30"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-07","vendors":["langflow-ai"]},"summary":"Authenticated attackers can access and execute other users' AI workflows by manipulating flow IDs in API requests.","url":"https://insights.sbomify.com/CVE-2026-55255/"}