Is langchain-exa affected by CVE-2024-58340?

PyPI langchain-exa is affected in <1.0.0a1.

Is CVE-2024-58340 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

high

CVE-2024-58340

Q: Is CVE-2024-58340 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

PyPI · langchain-exa

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_parser.py). The parser applies a backtracking-prone regular expression when extracting tool actions fr

Severity: high
EPSS: 0.4% (p32)
Also known as: PYSEC-2026-75
Published: 2026-01-12

References

https://www.langchain.com/
https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos
https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.