cve.bz

CVE-2024-1455

5.9 mediumEPSS 0.8%

Medium (5.9) in langchain langchain. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in langchain-core 0.1.35.

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).

Severity

CVSS 3.1

5.9 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
CWE
CWE-776
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-q84m-rmw3-4382PyPIlangchain-core<0.1.350.1.35
PYSEC-2026-1519PyPIlangchain-core<0.1.350.1.35

References

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