CVE-2026-8476Network attack vector

Remote code execution via unsafe cache deserialization

Published Jul 17, 2026 · Updated Jul 17, 2026

Unsafe deserialization in IBM Langflow OSS 1.0.0 through 1.10.0 allows attackers to execute server-side code via malicious cached pickle data. The AsyncDiskCache class passes disk-cached objects to pickle.loads() without validation, integrity verification, or authentication. Exploitation requires influence over cached data through filesystem access, shared storage, a user-controlled workflow, custom components, or API manipulation, and code runs with the Langflow server process privileges.

CVSS severity9.9
Critical
EPSS probability0.97%
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 IBM Langflow OSS 1.0.0 through 1.10.0 allows attackers to execute server-side code via malicious cached pickle data. The AsyncDiskCache class passes disk-cached objects to pickle.loads() without validation, integrity verification, or authentication. Exploitation requires influence over cached data through filesystem access, shared storage, a user-controlled workflow, custom components, or API manipulation, and code runs with the Langflow server process privileges.

The record

CVE
CVE-2026-8476
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-502, T1059.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2026Record 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=1.0.0 <=1.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.0

Published CVSS scores

9.9IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059.006Command and Scripting Interpreter: Python

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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