# CVE-2024-1455

## Summary

- **CVE ID:** CVE-2024-1455
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-776
- **Published:** Mar 26, 2024
- **Last Modified:** Mar 13, 2026

## Description

A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation. By nesting multiple layers of entities within an XML document, an attacker can cause the XML parser to consume excessive CPU and memory resources, leading to a denial of service (DoS).

## Affected Products

- langchain-ai — langchain-ai/langchain (unspecified)

## References

- [CNA](https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6)
- [CNA](https://github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92a3)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.77%
- **EPSS Percentile:** 53.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._