CVE-2026-12945Network attack vectorHinoki check available

Cross-user build disclosure and cancellation via unscoped endpoints

Published Jul 30, 2026 · Updated Jul 30, 2026

Improper access control in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote authenticated users to access other users' build jobs. The /logs and /logs-stream routes authorize any active user instead of requiring a superuser, while public job event and cancellation handlers accept unowned job identifiers. Ordinary authenticated access is sufficient to disclose build activity and interrupt another user's in-flight job.

CVSS severity7.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote authenticated users to access other users' build jobs. The /logs and /logs-stream routes authorize any active user instead of requiring a superuser, while public job event and cancellation handlers accept unowned job identifiers. Ordinary authenticated access is sufficient to disclose build activity and interrupt another user's in-flight job.

The record

CVE
CVE-2026-12945
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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 privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.1

Published CVSS scores

7.1IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

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 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-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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