Critical 9.1Published Dec 17, 2025

CVE-2025-68435Zerobyte has Authentication Bypass by Primary Weakness

Updated under an hour ago (Oct 26, 2026, 9:30 AM ET)

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It affects nicotsx zerobyte. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for nicotsx zerobyte

Exploited in the last 30 days

Zerobyte is a backup automation tool Zerobyte versions prior to 0.18.5 and 0.19.0 contain an authentication bypass vulnerability where authentication middleware is not properly applied to API endpoints. This results in certain API endpoints being accessible without valid session credentials. This is dangerous for those who have exposed Zerobyte to be used outside of their internal network. A fix has been applied in both version 0.19.0 and 0.18.5. If immediate upgrade is not possible, restrict network access to the Zerobyte instance to trusted networks only using firewall rules or network segmentation. This is only a temporary mitigation; upgrading is strongly recommended.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-305
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 18, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nicotsx zerobyte nicotsx:zerobyte (from the name)	before 0.18.5	CNA record
nicotsx zerobyte nicotsx:zerobyte	before 0.18.5; 0.19.0	NVD

References

https://github.com/nicotsx/zerobyte/security/advisories/GHSA-x539-c98q-38gvx-refsource-confirm, mitigation, patch, vendor-advisory
https://github.com/nicotsx/zerobyte/issues/161x-refsource-misc, issue-tracking
https://github.com/nicotsx/zerobyte/commit/13e080a18967705bd2b4e110e5f7693fdca1c692x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.