CVE-2026-21445Known exploitationPublic exploitNetwork attack vector

Unauthenticated data access and deletion via unguarded endpoints

Published Jan 2, 2026 · Updated Jan 2, 2026

Missing authentication in Langflow OSS before 1.7.0.dev45 allows remote attackers to read monitoring data and delete message sessions. Three routes in api/v1/monitor.py omit the get_current_active_user dependency, so GET requests return conversations or transactions and DELETE removes a session. Network access to a running server is sufficient; no credentials or user interaction are required, and the reported consequences are data disclosure and message deletion.

CVSS severity9.3
Critical
EPSS probability33.71%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Langflow OSS before 1.7.0.dev45 allows remote attackers to read monitoring data and delete message sessions. Three routes in api/v1/monitor.py omit the get_current_active_user dependency, so GET requests return conversations or transactions and DELETE removes a session. Network access to a running server is sufficient; no credentials or user interaction are required, and the reported consequences are data disclosure and message deletion.

The record

CVE
CVE-2026-21445
Published
Jan 2, 2026
Updated
Jan 2, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2026Record updatedLatest update available in the CVE record.
  3. Apr 9, 2026Exploitation reportedCrowdSec in-the-wild exploitation telemetry

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=< 1.7.0.dev45

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · Langflow OSSversion=< 1.7.0.dev45

Published CVSS scores

8.8GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
9.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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