CVE-2026-40690

Q: How do I fix CVE-2026-40690?

Upgrade airflow to 3.2.1 or later.

Q: Is CVE-2026-40690 being actively exploited?

Not that we know of. CVE-2026-40690 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.35% is the estimated probability that it will be exploited in the next 30 days. That is higher than 28% of all scored CVEs.

Q: How severe is CVE-2026-40690?

CVE-2026-40690 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-40690 affect?

Published advisories record a fix for airflow (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.3

CVSS v3

NVD

Description

The asset dependency graph did not restrict nodes by the viewer's DAG read permissions: a user with read access to at least one DAG could browse the asset graph for any other asset in the deployment and learn the existence and names of DAGs and assets outside their authorized scope. Users are recommended to upgrade to version 3.2.1, which fixes this issue.

CWE-1220

How to fix

Remediation Available

airflowNVD

Affected:< 3.2.1Fixed in:3.2.1CVE-2026-40690derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.35%probability of exploitation in 30 days

28thpercentile

Low risk: more likely to be exploited than 28% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

lists.apache.org

Third-Party Advisory1

openwall.com

Related Vulnerabilities

Other CWE-1220 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-31201	Critical	9.8	15%	KEV	Fix
CVE-2026-33825	High	7.8	6.7%	KEV + Ransom	Fix
CVE-2024-42365	High	7.4	4.7%	-	Fix
CVE-2026-39363	High	7.5	3.3%	-	Fix
CVE-2026-49170	High	7.8	2.8%	-	Fix
CVE-2023-43040	Medium	6.5	2.5%	-	Fix

Common questions

How do I fix CVE-2026-40690?

Upgrade airflow to 3.2.1 or later.

Is CVE-2026-40690 being actively exploited?

Not that we know of. CVE-2026-40690 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.35% is the estimated probability that it will be exploited in the next 30 days. That is higher than 28% of all scored CVEs.

How severe is CVE-2026-40690?

CVE-2026-40690 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-40690 affect?

Published advisories record a fix for airflow (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-27.