CVE-2026-42901
CVE-2026-42901 is a critical-severity vulnerability in Microsoft Entra Id with a CVSS 3.x base score of 10.0. 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-346.
Key facts
- Severity: Critical (CVSS 3.x base score 10.0)
- EPSS exploit prediction: 0% (22nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-31522
- Weakness: CWE-346
- Affected product: Microsoft Entra Id
- Published:
- Last modified:
Description
Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
Frequently asked questions
- What is CVE-2026-42901?
- Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
- How severe is CVE-2026-42901?
- CVE-2026-42901 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-42901 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42901?
- CVE-2026-42901 affects Microsoft Entra Id. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-42901?
- 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-2026-42901 have an EU (EUVD) identifier?
- Yes. CVE-2026-42901 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31522.
- When was CVE-2026-42901 published?
- CVE-2026-42901 was published on 2026-05-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:microsoft:entra_id:-:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Entra Id
- CVE-2026-35431 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Entra ID Entitlement Management allows an unauthorized attacker to…
- CVE-2025-55241 — Critical (CVSS 10.0): Azure Entra ID Elevation of Privilege Vulnerability
- CVE-2025-59246 — Critical (CVSS 9.8): Azure Entra ID Elevation of Privilege Vulnerability
- CVE-2025-59218 — Critical (CVSS 9.6): Azure Entra ID Elevation of Privilege Vulnerability
- CVE-2026-40379 — Critical (CVSS 9.3): Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform…
- CVE-2026-24305 — Critical (CVSS 9.3): Azure Entra ID Elevation of Privilege Vulnerability
All CVEs affecting Microsoft Entra Id →
Other CWE-346 vulnerabilities
- CVE-2026-6508 — Critical (CVSS 9.8): Origin Validation Error vulnerability in TUBITAK BILGEM Software Technologies Research Institute Liderahenk allows…
- CVE-2026-2790 — Critical (CVSS 9.8): Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 148, Firefox ESR…
- CVE-2022-50925 — Critical (CVSS 9.8): Prowise Reflect version 1.0.9 contains a remote keystroke injection vulnerability that allows attackers to send…
- CVE-2025-30466 — Critical (CVSS 9.8): This issue was addressed through improved state management. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS…
- CVE-2024-8487 — Critical (CVSS 9.8): A Cross-Origin Resource Sharing (CORS) vulnerability exists in modelscope/agentscope version v0.0.4. The CORS…
- CVE-2024-10534 — Critical (CVSS 9.8): Origin Validation Error vulnerability in Dataprom Informatics Personnel Attendance Control Systems (PACS) / Access…