CVE-2026-43826 Vulnerability Analysis & Exploit Details

CVE-2026-43826
Vulnerability Scoring

6.5
/10
High Risk

If left unpatched, CVE-2026-43826 could lead to major system disruptions or data loss.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-43826 Details

Status: Analyzed

Last updated: 🕑 13 May 2026, 14:05 UTC
Originally published on: 🕘 11 May 2026, 09:16 UTC

Time between publication and last update: 2 days

CVSS Release: version 3

CVSS3 Source

134c704f-9b21-4f2e-91b3-4a467353bcc0

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVE-2026-43826 Vulnerability Summary

CVE-2026-43826: The OpenSearch logging provider, when configured with a `host` URL that embeds credentials (for example `https://user:password@server.example.com:9200`), wrote the full host URL — including the embedded credentials — into task logs. Any user with task-log read permission could harvest the backend credentials. Users are advised to upgrade to `apache-airflow-providers-opensearch` 1.9.1 or later and, as a defense-in-depth measure, configure the backend credentials via a secret backend rather than embedding them in the `[opensearch] host` URL.

Assessing the Risk of CVE-2026-43826

Access Complexity Graph

The exploitability of CVE-2026-43826 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-43826

CVE-2026-43826 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-43826, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-43826, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-43826 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2026-43826 poses no threat to data integrity.
  • Availability: None
    CVE-2026-43826 does not impact system availability.

CVE-2026-43826 References

External References

CWE Common Weakness Enumeration

CWE-532

CAPEC Common Attack Pattern Enumeration and Classification

  • Fuzzing for application mapping CAPEC-215 An attacker sends random, malformed, or otherwise unexpected messages to a target application and observes the application's log or error messages returned. The attacker does not initially know how a target will respond to individual messages but by attempting a large number of message variants they may find a variant that trigger's desired behavior. In this attack, the purpose of the fuzzing is to observe the application's log and error messages, although fuzzing a target can also sometimes cause the target to enter an unstable state, causing a crash.

Vulnerable Configurations

  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.2:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.2:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.1.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.2.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.3.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.3.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.3.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.3.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.4.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.4.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.4.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.4.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.5.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.5.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.5.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.5.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.2:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.2:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.3:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.3:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.3:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.6.3:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.2:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.2:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.3:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.3:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.3:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.3:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.4:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.4:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.4:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.4:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.5:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.5:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.5:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.7.5:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.2:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.2:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.3:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.3:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.3:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.3:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.4:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.4:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.4:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.4:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.5:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.5:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.5:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.8.5:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.9.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.9.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.9.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:apache-airflow-providers-opensearch:1.9.0:rc1:*:*:*:*:*:*

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