CVE-2026-13446Public exploitNetwork attack vector

Superuser takeover via enforced default credentials

Published Jul 17, 2026 · Updated Jul 17, 2026

Hard-coded credentials in IBM Langflow OSS 1.0.0 through 1.10.1 allow remote attackers to authenticate as a superuser via its login endpoint. At startup, the authentication setup enforces built-in default superuser credentials even when replacement values are supplied through environment variables. Any network-reachable login endpoint accepts the known credentials, granting administrative access without prior authentication.

CVSS severity9.8
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in IBM Langflow OSS 1.0.0 through 1.10.1 allow remote attackers to authenticate as a superuser via its login endpoint. At startup, the authentication setup enforces built-in default superuser credentials even when replacement values are supplied through environment variables. Any network-reachable login endpoint accepts the known credentials, granting administrative access without prior authentication.

The record

CVE
CVE-2026-13446
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-798, T1078.001
Attack vector
network
Privileges
unauthenticated

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 <=1.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.1

Published CVSS scores

9.8IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Default Accounts

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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