Vulnerability
CVE-2026-123158
OpenBSD OpenSSH: authentication bypass
Most severe levelDEFCON 2 · Severe risk
Official data
- CVSS 3.1
- 8.1 · high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-394
- EPSS
- 0.98% probability of exploitation in the next 30 days, higher than 62% of CVEs
- CISA KEV catalogue
- No
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 7 November 2026.
Timeline
- 5 November 2026Published on NVD
- 6 November 2026First in the DefenceLevel briefing
In DefenceLevel briefings2 days
- 7 November 2026New in the last 24 hoursDEFCON 2
- 6 November 2026Much discussed
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.