Vulnerability in Langchain
CVE-2024-58340
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 backtrac…
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.004 (32.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Langchain
- Langchain Ai — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit, Issue Tracking)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2024-58340?
- CVE-2024-58340 is a high-severity vulnerability in Langchain, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2026-01-12.
- How severe is CVE-2024-58340?
- High severity. CVSS v3 base score is 7.5 out of 10.