How severe is CVE-2026-42823?

CVE-2026-42823 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42823 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42823?

CVE-2026-42823 affects Microsoft Azure Logic Apps. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42823?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-42823 have an EU (EUVD) identifier?

Yes. CVE-2026-42823 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29708.

When was CVE-2026-42823 published?

CVE-2026-42823 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42823

CVE-2026-42823 is a critical-severity vulnerability in Microsoft Azure Logic Apps with a CVSS 3.x base score of 9.9. 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-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29708
Weakness: CWE-284
Affected product: Microsoft Azure Logic Apps
Published: 2026-05-12
Last modified: 2026-06-17

Description

Improper access control in Azure Logic Apps allows an authorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-42823?: Improper access control in Azure Logic Apps allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-42823?: CVE-2026-42823 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42823 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42823?: CVE-2026-42823 affects Microsoft Azure Logic Apps. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42823?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-42823 have an EU (EUVD) identifier?: Yes. CVE-2026-42823 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29708.
When was CVE-2026-42823 published?: CVE-2026-42823 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42823

Affected products (1)

cpe:2.3:a:microsoft:azure_logic_apps:-:*:*:*:*:*:*:*

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