How severe is CVE-2026-6266?

CVE-2026-6266 has a CVSS 3.x base score of 8.3, rated high 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 low.

Is CVE-2026-6266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-6266?

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

Does CVE-2026-6266 have an EU (EUVD) identifier?

Yes. CVE-2026-6266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26967.

When was CVE-2026-6266 published?

CVE-2026-6266 was published on 2026-05-04 and last updated on 2026-06-30.

CVE-2026-6266

CVE-2026-6266 is a high-severity vulnerability with a CVSS 3.x base score of 8.3. 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-305.

Key facts

Severity: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26967
Weakness: CWE-305
Published: 2026-05-04
Last modified: 2026-06-30

Description

A flaw was found in the AAP gateway. The user auto-link strategy, introduced in AAP 2.6, automatically links an external Identity Provider (IDP) identity to an existing AAP user account based on email matching without verifying email ownership. This allows a remote attacker to potentially hijack a victim's account or gain unauthorized access to other accounts, including administrative accounts, by manipulating the IDP-provided email.

Frequently asked questions

What is CVE-2026-6266?: A flaw was found in the AAP gateway. The user auto-link strategy, introduced in AAP 2.6, automatically links an external Identity Provider (IDP) identity to an existing AAP user account based on email matching without verifying email ownership. This allows a remote attacker to potentially hijack a victim's account or gain unauthorized access to other accounts, including administrative accounts, by manipulating the IDP-provided email.
How severe is CVE-2026-6266?: CVE-2026-6266 has a CVSS 3.x base score of 8.3, rated high 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 low.
Is CVE-2026-6266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-6266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-6266 have an EU (EUVD) identifier?: Yes. CVE-2026-6266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26967.
When was CVE-2026-6266 published?: CVE-2026-6266 was published on 2026-05-04 and last updated on 2026-06-30.

References

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