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[NEW] [medium] Nextcloud: Multiple Vulnerabilities

mediumCVE-2026-61527CVE-2026-61545
A remote, authenticated attacker can exploit multiple vulnerabilities in Nextcloud to bypass security precautions and disclose information.

CSIRTS triage

vendor: Nextcloudproduct: NextcloudAuthentication bypassInformation disclosure
What
Multiple vulnerabilities enable authenticated attackers to bypass security controls and disclose sensitive information.
Who is affected
Nextcloud deployments accessible to authenticated users.
Urgency
Medium urgency; vulnerabilities require authentication but enable privilege escalation and data leakage.
Action
Apply security patches for CVE-2026-61527 and CVE-2026-61545 when released by Nextcloud.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2685

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-61527coverage & exploitation statusNVD · CVE.org
CVE-2026-61545coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Nextcloud

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories