CVE-2026-43826Network attack vector

Credential disclosure via unredacted task-log labels

Published May 11, 2026 · Updated May 11, 2026

Credential exposure in Apache Airflow Providers OpenSearch before 1.9.1 allows remote authenticated users to read backend credentials. The log-grouping methods in OpensearchTaskHandler and OpensearchRemoteLogIO use the raw host URL as a fallback task-log source label, retaining embedded user information. Exposure requires credentials embedded in the host URL and task-log read permission; affected users can harvest those credentials but cannot alter data through this flaw.

CVSS severity6.5
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Apache Airflow Providers OpenSearch before 1.9.1 allows remote authenticated users to read backend credentials. The log-grouping methods in OpensearchTaskHandler and OpensearchRemoteLogIO use the raw host URL as a fallback task-log source label, retaining embedded user information. Exposure requires credentials embedded in the host URL and task-log read permission; affected users can harvest those credentials but cannot alter data through this flaw.

The record

CVE
CVE-2026-43826
Published
May 11, 2026
Updated
May 11, 2026
Vendor
The Apache Software Foundation
Product
apache-airflow-providers-opensearch
Classifications
CWE-532, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=0 <1.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · apache-airflow-providers-opensearchversion=0 <1.9.1

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1552.001Credentials In Files

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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