How severe is CVE-2026-45267?

CVE-2026-45267 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-45267 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45267?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45267 have an EU (EUVD) identifier?

Yes. CVE-2026-45267 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33679.

When was CVE-2026-45267 published?

CVE-2026-45267 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-45267

CVE-2026-45267 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33679
Weakness: CWE-200
Published: 2026-06-01
Last modified: 2026-06-17

Description

Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.

Frequently asked questions

What is CVE-2026-45267?: Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
How severe is CVE-2026-45267?: CVE-2026-45267 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-45267 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-45267?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45267 have an EU (EUVD) identifier?: Yes. CVE-2026-45267 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33679.
When was CVE-2026-45267 published?: CVE-2026-45267 was published on 2026-06-01 and last updated on 2026-06-17.

References

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