Low severity · published Sep 18, 2026
CVE-2026-68493
After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of
3.1
CVSS
0.2%
EPSS
No
On KEV
Description
After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Server · Nextcloud
32.0.0 through 34.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68493
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-68493
hackerone.com
https://hackerone.com/reports/3484601
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