CVE-2026-19300Network attack vectorHinoki check available

Credential disclosure via incomplete public-flow secret scrubbing

Published Sep 4, 2026 · Updated Sep 4, 2026

Information disclosure in IBM Langflow OSS 1.0.0 through 1.11.2 allows remote attackers to read stored credentials through a public flow endpoint. The endpoint's secret-scrubbing routine applies a heuristic field-name denylist that omits Authentication, X-Session-Id, App-Key, and JWT, returning those stored values verbatim. No authentication is required, but the request must identify a public flow and its owner's user identifier; exposure is limited to secrets stored in omitted fields.

CVSS severity7.5
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Information disclosure in IBM Langflow OSS 1.0.0 through 1.11.2 allows remote attackers to read stored credentials through a public flow endpoint. The endpoint's secret-scrubbing routine applies a heuristic field-name denylist that omits Authentication, X-Session-Id, App-Key, and JWT, returning those stored values verbatim. No authentication is required, but the request must identify a public flow and its owner's user identifier; exposure is limited to secrets stored in omitted fields.

The record

CVE
CVE-2026-19300
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-200, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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 <=1.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.2

Published CVSS scores

7.5IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1213Data from Information Repositories

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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