{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55531", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T23:01:04.073Z", "datePublished": "2026-08-25T14:33:51.733Z", "dateUpdated": "2026-08-25T16:14:09.460Z"}, "containers": {"cna": {"title": "PraisonAI: Unauthenticated unbounded session accumulation in the PraisonAI MCP HTTP server (memory exhaustion; session TTL never enforced)", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wv94-5qcp-6m36", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wv94-5qcp-6m36"}, {"name": "https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1", "tags": ["x_refsource_MISC"], "url": "https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1"}, {"name": "https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58", "tags": ["x_refsource_MISC"], "url": "https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58"}], "affected": [{"vendor": "MervinPraison", "product": "PraisonAI", "versions": [{"version": "< 4.6.58", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-25T14:33:51.733Z"}, "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream mcp_post handler creates a new _sessions entry for every initialize request but does not call _cleanup_sessions or enforce a maximum. An unauthenticated caller can exhaust memory. The fix invokes cleanup and limits sessions through PRAISONAI_MCP_MAX_SESSIONS. This issue is fixed in version 4.6.58."}], "source": {"advisory": "GHSA-wv94-5qcp-6m36", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wv94-5qcp-6m36", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-25T16:13:49.692230Z", "id": "CVE-2026-55531", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T16:14:09.460Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "PraisonAI", "vendor": "MervinPraison", "versions": [{"status": "affected", "version": "< 4.6.58"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream mcp_post handler creates a new _sessions entry for every initialize request but does not call _cleanup_sessions or enforce a maximum. An unauthenticated caller can exhaust memory. The fix invokes cleanup and limits sessions through PRAISONAI_MCP_MAX_SESSIONS. This issue is fixed in version 4.6.58."}], "id": "CVE-2026-55531", "lastModified": "2026-08-25T15:16:34.017", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-25T15:16:34.017", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1"}, {"source": "security-advisories@github.com", "url": "https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58"}, {"source": "security-advisories@github.com", "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wv94-5qcp-6m36"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

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