How severe is CVE-2026-43826?

CVE-2026-43826 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-43826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-43826?

CVE-2026-43826 affects Apache Apache-airflow-providers-opensearch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-43826?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-43826 have an EU (EUVD) identifier?

Yes. CVE-2026-43826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29042.

When was CVE-2026-43826 published?

CVE-2026-43826 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-43826

CVE-2026-43826 is a medium-severity vulnerability in Apache Apache-airflow-providers-opensearch with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-532.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29042
Weakness: CWE-532
Affected product: Apache Apache-airflow-providers-opensearch
Published: 2026-05-11
Last modified: 2026-06-17

Description

The OpenSearch logging provider, when configured with a `host` URL that embeds credentials (for example `https://user:[email protected]: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.

Frequently asked questions

What is CVE-2026-43826?: The OpenSearch logging provider, when configured with a `host` URL that embeds credentials (for example `https://user:[email protected]: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.
How severe is CVE-2026-43826?: CVE-2026-43826 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-43826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-43826?: CVE-2026-43826 affects Apache Apache-airflow-providers-opensearch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-43826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-43826 have an EU (EUVD) identifier?: Yes. CVE-2026-43826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29042.
When was CVE-2026-43826 published?: CVE-2026-43826 was published on 2026-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:apache-airflow-providers-opensearch:*:*:*:*:*:*:*:*

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