CVE-2026-6598Public exploitNetwork attack vector

Authentication-secret disclosure via skipped project encryption

Published Apr 20, 2026 · Updated Apr 20, 2026

Cleartext storage in Langflow OSS before 1.9.1 allows remote authenticated users to expose project authentication secrets. The create_project endpoint persists auth_settings without applying encrypt_auth_settings before writing the project record. A valid low-privilege account and project-creation access are required; access to the stored record then reveals API keys or OAuth client secrets.

CVSS severity4.3
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext storage in Langflow OSS before 1.9.1 allows remote authenticated users to expose project authentication secrets. The create_project endpoint persists auth_settings without applying encrypt_auth_settings before writing the project record. A valid low-privilege account and project-creation access are required; access to the stored record then reveals API keys or OAuth client secrets.

The record

CVE
CVE-2026-6598
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-312, CWE-313, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 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=1.8.0
  2. Affected versionversion=1.8.1
  3. Affected versionversion=1.8.2
  4. Affected versionversion=1.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenBMC Project · Langflow OSSversion=1.8.0; version=1.8.1; version=1.8.2; version=1.8.3

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
4.0VulDBAV:N/AC:L/Au:S/C:P/I:N/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
CWE-313Cleartext Storage in a File or on Disk
T1552.001Unsecured Credentials: Credentials In Files

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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