CVE-2024-5998Public exploitNetwork attack vector

Arbitrary code execution via unsafe pickle deserialization

Published Sep 17, 2024 · Updated Sep 17, 2024

Unsafe deserialization in FAISS.deserialize_from_bytes before 0.2.4 allows remote attackers to execute arbitrary code through crafted bytes. The method passes its serialized argument directly to pickle.loads without first requiring an explicit trust decision. An application must accept attacker-supplied bytes and invoke the method; resulting commands run with the application process's privileges.

CVSS severity8.4
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in FAISS.deserialize_from_bytes before 0.2.4 allows remote attackers to execute arbitrary code through crafted bytes. The method passes its serialized argument directly to pickle.loads without first requiring an explicit trust decision. An application must accept attacker-supplied bytes and invoke the method; resulting commands run with the application process's privileges.

The record

CVE
CVE-2024-5998
Published
Sep 17, 2024
Updated
Sep 17, 2024
Vendor
LangChain
Product
LangChain
Classifications
CWE-502, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.2.9
  2. Affected versionversion=unspecified <0.2.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LangChain · LangChainversion=0 <0.2.9; version=unspecified <0.2.9

Published CVSS scores

5.2Protect AICVSS:3.0/AV:P/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
8.4GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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