How severe is CVE-2026-54220?

CVE-2026-54220 has a CVSS 4.0 base score of 8.6, rated high severity.

Is CVE-2026-54220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54220?

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-2026-54220 have an EU (EUVD) identifier?

Yes. CVE-2026-54220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37883.

When was CVE-2026-54220 published?

CVE-2026-54220 was published on 2026-06-18.

CVE-2026-54220

CVE-2026-54220 is a high-severity vulnerability with a CVSS 4.0 base score of 8.6. 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-352.

Key facts

Severity: High (CVSS 4.0 base score 8.6)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37883
Weakness: CWE-352
Published: 2026-06-18
Last modified: 2026-06-18

Description

uBB.threads is vulnerable to a Cross-Site Request Forgery (CSRF) due to a lack of protective mechanisms. This allows an attacker to trick an authenticated user into executing unintended actions. 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-2026-54220?: uBB.threads is vulnerable to a Cross-Site Request Forgery (CSRF) due to a lack of protective mechanisms. This allows an attacker to trick an authenticated user into executing unintended actions. 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-2026-54220?: CVE-2026-54220 has a CVSS 4.0 base score of 8.6, rated high severity.
Is CVE-2026-54220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-54220?: 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-2026-54220 have an EU (EUVD) identifier?: Yes. CVE-2026-54220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37883.
When was CVE-2026-54220 published?: CVE-2026-54220 was published on 2026-06-18.

References

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