{"answers":{"affected":"3 open source packages ship an affected version, including praisonai. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34939 exists.","fix":"Upgrade praisonai to 4.5.90 or later.","what":"CVE-2026-34939 is a medium-severity denial of service vulnerability in MervinPraison PraisonAI, published on 3 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34939 and fix it if it is affected.\n\nWhat it is: CVE-2026-34939 is a medium-severity denial of service vulnerability in MervinPraison PraisonAI, published on 3 Apr 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-2026-34939 exists.\n\nAffected packages and fixed versions:\n- praisonai (PyPI): affected all versions; fixed in 4.5.90\n- praisonai (PyPI): affected all versions; fixed in 4.5.90\n- praisonai (PyPI): affected all versions; fixed in 4.5.90\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-2026-34939/ (Markdown: https://insights.sbomify.com/CVE-2026-34939/index.md)","id":"CVE-2026-34939","markdown":"https://insights.sbomify.com/CVE-2026-34939/index.md","name":"CVE-2026-34939","record":{"aliases":["GHSA-8w9j-hc3g-3g7f","PYSEC-2026-2907"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python AI library","requires_auth":"low_privilege","summary":"Attackers can cause service outages in PraisonAI by supplying malicious regex patterns that trigger catastrophic backtracking, requiring an upgrade to fix.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"praisonai","vendor":"praison"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"PraisonAI is a multi-agent teams system. Prior to version 4.5.90, MCPToolIndex.search_tools() compiles a caller-supplied string directly as a Python regular expression with no validation, sanitization, or timeout. A crafted regex causes catastrophic backtracking in the re engine, blocking the Python thread for hundreds of seconds and causing a complete service outage. This issue has been patched in version 4.5.90.","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: ReDoS via Unvalidated User-Controlled Regex in MCPToolIndex.search_tools()","id":"CVE-2026-34939","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"KubeAI: OS Command Injection via Model URL in Ollama Engine startup probe allows arbitrary command execution in model pods","id":"CVE-2026-34940"},"packages":[{"ecosystem":"PyPI","fixed":["4.5.90"],"introduced":["0"],"last_affected":[],"package":"praisonai","purl":null,"source":"GHSA-8w9j-hc3g-3g7f"},{"ecosystem":"PyPI","fixed":["4.5.90"],"introduced":["0"],"last_affected":[],"package":"praisonai","purl":"pkg:pypi/praisonai","source":"GHSA-8w9j-hc3g-3g7f"},{"ecosystem":"PyPI","fixed":["4.5.90"],"introduced":["0"],"last_affected":[],"package":"praisonai","purl":"pkg:pypi/praisonai","source":"PYSEC-2026-2907"}],"prev":{"headline":"PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code","id":"CVE-2026-34938"},"products":["PraisonAI"],"published":"2026-04-03","related":[{"cvss_score":10,"headline":"PraisonAIAgents has a sandbox escape via exception frame traversal in `execute_code` (subprocess mode)","id":"CVE-2026-39888","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":9.8,"headline":"Incomplete fix for CVE-2026-34935: Command Injection in MervinPraison/PraisonAI","id":"CVE-2026-41497","kev_date_added":null,"published":"2026-05-08"},{"cvss_score":9.8,"headline":"PraisonAI: Critical RCE via `type: job` workflow YAML","id":"CVE-2026-40288","kev_date_added":null,"published":"2026-04-14"},{"cvss_score":9.8,"headline":"PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading","id":"CVE-2026-39890","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":9.8,"headline":"PraisonAI: Second-Order SQL Injection in `get_all_user_threads`","id":"CVE-2026-34934","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":9.8,"headline":"PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()","id":"CVE-2026-34935","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":9.7,"headline":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in praisonai","id":"CVE-2026-40088","kev_date_added":null,"published":"2026-04-09"}],"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":"2026-04-06","vendors":["MervinPraison"]},"summary":"Attackers can cause service outages in PraisonAI by supplying malicious regex patterns that trigger catastrophic backtracking, requiring an upgrade to fix.","url":"https://insights.sbomify.com/CVE-2026-34939/"}