{"answers":{"affected":"3 open source packages ship an affected version, including praisonai and PraisonAI.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55529 exists.","fix":"Upgrade praisonai to 4.6.58 or later.","what":"CVE-2026-55529 is a medium-severity authentication bypass vulnerability in MervinPraison PraisonAI, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55529 and fix it if it is affected.\n\nWhat it is: CVE-2026-55529 is a medium-severity authentication bypass vulnerability in MervinPraison PraisonAI, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55529 exists.\n\nAffected packages and fixed versions:\n- praisonai (PyPI): affected all versions; fixed in 4.6.58\n- praisonai (PyPI): affected all versions; fixed in 4.6.58\n- PraisonAI (PyPI): affected all versions; fixed in 4.6.58\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-2026-55529/ (Markdown: https://insights.sbomify.com/CVE-2026-55529/index.md)","id":"CVE-2026-55529","markdown":"https://insights.sbomify.com/CVE-2026-55529/index.md","name":"CVE-2026-55529","record":{"aliases":["GHSA-wj6g-v78p-6fx3","PYSEC-2026-3896"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python AI agent library","requires_auth":"none","summary":"Attackers can bypass origin validation to execute tools on local MCP servers via malicious webpages, requiring an upgrade to PraisonAI.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"},{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream _validate_origin method accepts request_origin.startswith(allowed), so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit tools/call requests to the local MCP server and execute exposed tools. This issue is fixed in version 4.6.58.","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":"PraisonAI has an origin validation bypass in MCP HTTP Stream transport that allows browser-mediated unauthenticated tool execution on local MCP server","id":"CVE-2026-55529","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"praisonaiagents: ast_grep_rewrite rewrites arbitrary files without the @require_approval gate enforced on every sibling mutation tool","id":"CVE-2026-55530"},"packages":[{"ecosystem":"PyPI","fixed":["4.6.58"],"introduced":["0"],"last_affected":[],"package":"PraisonAI","purl":null,"source":"GHSA-wj6g-v78p-6fx3"},{"ecosystem":"PyPI","fixed":["4.6.58"],"introduced":["0"],"last_affected":[],"package":"praisonai","purl":"pkg:pypi/praisonai","source":"GHSA-wj6g-v78p-6fx3"},{"ecosystem":"PyPI","fixed":["4.6.58"],"introduced":["0"],"last_affected":[],"package":"praisonai","purl":"pkg:pypi/praisonai","source":"PYSEC-2026-3896"}],"prev":{"headline":"praisonaiagents: AgentServer declares auth_token but never enforces it on any route (CWE-862)","id":"CVE-2026-55528"},"products":["PraisonAI"],"published":"2026-08-25","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-08-27","vendors":["MervinPraison"]},"summary":"Attackers can bypass origin validation to execute tools on local MCP servers via malicious webpages, requiring an upgrade to PraisonAI.","url":"https://insights.sbomify.com/CVE-2026-55529/"}