How severe is CVE-2026-54224?

CVE-2026-54224 has a CVSS 4.0 base score of 7.1, rated high severity.

Is CVE-2026-54224 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54224?

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-2026-54224 have an EU (EUVD) identifier?

Yes. CVE-2026-54224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37887.

When was CVE-2026-54224 published?

CVE-2026-54224 was published on 2026-06-18.

CVE-2026-54224

CVE-2026-54224 is a high-severity vulnerability with a CVSS 4.0 base score of 7.1. 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-405.

Key facts

Severity: High (CVSS 4.0 base score 7.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37887
Weakness: CWE-405
Published: 2026-06-18
Last modified: 2026-06-18

Description

UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.

Frequently asked questions

What is CVE-2026-54224?: UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
How severe is CVE-2026-54224?: CVE-2026-54224 has a CVSS 4.0 base score of 7.1, rated high severity.
Is CVE-2026-54224 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-54224?: 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-2026-54224 have an EU (EUVD) identifier?: Yes. CVE-2026-54224 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37887.
When was CVE-2026-54224 published?: CVE-2026-54224 was published on 2026-06-18.

References

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