CVE-2026-39889

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{"affected": [{"affectedData": [{"product": "PraisonAI", "vendor": "MervinPraison", "versions": [{"status": "affected", "version": "< 4.5.115"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "matchCriteriaId": "B0754891-B47D-441D-A0E6-710A49389AE4", "versionEndIncluding": "4.5.114", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.115, the A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create_a2u_routes() function registers the following endpoints with NO authentication checks: /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health. This vulnerability is fixed in 4.5.115."}, {"lang": "es", "value": "PraisonAI es un sistema de equipos multiagente. Antes de 4.5.115, el servidor de flujo de eventos A2U (Agente-a-Usuario) en PraisonAI expone toda la actividad del agente sin autenticaci\u00f3n. La funci\u00f3n create_a2u_routes() registra los siguientes puntos finales SIN comprobaciones de autenticaci\u00f3n: /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, y /a2u/health. Esta vulnerabilidad est\u00e1 corregida en 4.5.115."}], "id": "CVE-2026-39889", "lastModified": "2026-07-24T21:10:00.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39889", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-10T20:53:53.370938Z", "version": "2.0.3"}}]}, "published": "2026-04-08T21:17:01.130", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-f292-66h9-fpmf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.115)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PraisonAI", "source": "cna", "vendor": "MervinPraison"}, "product": "praisonai", "vendor": "mervinpraison"}], "analysis": {"en": {"generated_at": "2026-04-17T09:26:42.713762+00:00", "value": {"mitigation_remediation": ["Apply the latest PraisonAI release (4.5.115 or newer) to remove the unauthenticated endpoints", "If an upgrade cannot be performed immediately, restrict network access to the A2U server using firewall rules or VPN so that only authorized users can connect", "Monitor logs for suspicious access to SSE streams after patching"], "summary": {"action": "Immediate Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to PraisonAI builds prior to version 4.5.115. Endpoints such as /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health are unprotected and may be accessed by anyone able to reach the A2U server. No other vendors or products are currently reported impacted.", "description_and_impact": "PraisonAI\u2019s Agent\u2011to\u2011User event stream server lacks authentication checks, allowing any user to subscribe to server\u2011sent events and view complete agent activity logs. This exposes private operational details, potential credentials, and internal communications. The vulnerability is a classic information\u2011disclosure flaw that can be exploited to learn sensitive system data without needing privileged access.", "risk_and_exploitability": "The CVSS base score of 7.5 indicates moderate\u2011to\u2011high severity. Although the EPSS score is less than 1%, the lack of authentication means an attacker only needs network access to the server, and no additional conditions or privileges are required. The vulnerability is not listed in the CISA KEV catalog, suggesting no mass exploitation yet, but the exposure of full agent activity poses significant risk to confidentiality and operational integrity. Because the attack vector is remote HTTP, any exposed network surface could be used by threat actors."}}}}, "created": "2026-04-09T08:17:51.523543+00:00", "updated": "2026-04-17T09:30:14.487858+00:00", "vendors": ["mervinpraison", "mervinpraison$PRODUCT$praisonai"]}