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{"bugzilla": {"description": "langchain: LangChain MRKLOutputParser ReDoS", "id": "2428827", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428827"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-1333", "details": ["LangChain versions up to and including 0.3.1 contain a regular expression denial-of-service (ReDoS) vulnerability in the MRKLOutputParser.parse() method (libs/langchain/langchain/agents/mrkl/output_parser.py). The parser applies a backtracking-prone regular expression when extracting tool actions from model output. 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Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "rhelai3/disk-image-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Not affected", "package_name": "rhoai/odh-llama-stack-core-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-trustyai-ragas-lls-provider-dsp-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-01-12T23:05:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-58340\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-58340\nhttps://github.com/langchain-ai/langchain\nhttps://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb\nhttps://www.langchain.com/\nhttps://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos"], "threat_severity": "Moderate"}