{"action":"Upgrade langchain-exa to 1.0.0a1 or later.","affected":[{"fixed":"1.0.0a1","introduced":"0"}],"component":"langchain-exa","cve_ids":["CVE-2024-58340"],"ecosystem":"PyPI","epss":0.00481,"exploited":false,"fixed_versions":["1.0.0a1"],"id":"tcs_01M5KHDADAZZ45YQWD4T5E45JW","modified_at":"2026-05-20T09:19:04.132922Z","published_at":"2026-01-12T23:15:51.780Z","references":["https://osv.dev/vulnerability/PYSEC-2026-75","https://www.langchain.com/","https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos","https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb","https://github.com/langchain-ai/langchain"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-75","url":"https://osv.dev/vulnerability/PYSEC-2026-75"}],"summary":"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_pa"}