How severe is CVE-2024-1455?

CVE-2024-1455 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-1455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-1455?

CVE-2024-1455 affects Langchain. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-1455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-1455 have an EU (EUVD) identifier?

Yes. CVE-2024-1455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0987.

When was CVE-2024-1455 published?

CVE-2024-1455 was published on 2024-03-26 and last updated on 2026-06-17.

CVE-2024-1455

CVE-2024-1455 is a medium-severity vulnerability in Langchain with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-776.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0987
Weakness: CWE-776
Affected product: Langchain
Published: 2024-03-26
Last modified: 2026-06-17

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).

Frequently asked questions

What is 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).
How severe is CVE-2024-1455?: CVE-2024-1455 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-1455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-1455?: CVE-2024-1455 affects Langchain. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-1455?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-1455 have an EU (EUVD) identifier?: Yes. CVE-2024-1455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0987.
When was CVE-2024-1455 published?: CVE-2024-1455 was published on 2024-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:*

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