How severe is CVE-2026-48611?

CVE-2026-48611 has a CVSS 3.x base score of 9.8, 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-2026-48611 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-48611?

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-2026-48611 have an EU (EUVD) identifier?

Yes. CVE-2026-48611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36375.

When was CVE-2026-48611 published?

CVE-2026-48611 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-48611

CVE-2026-48611 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36375
Weakness: CWE-287
Published: 2026-06-12
Last modified: 2026-06-17

Description

Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.

Frequently asked questions

What is CVE-2026-48611?: Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.
How severe is CVE-2026-48611?: CVE-2026-48611 has a CVSS 3.x base score of 9.8, 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-2026-48611 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-48611?: 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-2026-48611 have an EU (EUVD) identifier?: Yes. CVE-2026-48611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36375.
When was CVE-2026-48611 published?: CVE-2026-48611 was published on 2026-06-12 and last updated on 2026-06-17.

References

https://www.phpbb.com/community/viewtopic.php?t=2672170

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