XXE in Langchain
CVE-2024-1455
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (53.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000
Affected products
- Langchain
- Langchain-Ai Langchain-Ai/langchain — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6 (Exploit, Third Party Advisory)
- github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92… (Patch)
Frequently asked questions
- What is CVE-2024-1455?
- CVE-2024-1455 is a medium-severity vulnerability in Langchain, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 5.9/10. Published 2024-03-26.
- How severe is CVE-2024-1455?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2024-1455 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.