CVE-2026-55706 Auth bypass in OpenBSD
An attacker can bypass PPP authentication in OpenBSD by exploiting improper length validation in the PAP input handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55706?
CVE-2026-55706 is a medium-severity authentication bypass vulnerability in Openbsd Openbsd, published on 17 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
Weakness: CWE-1284
Which versions are affected by CVE-2026-55706?
It affects 1 product.
Products include Openbsd Openbsd.
How do I fix CVE-2026-55706?
No fix has been published for CVE-2026-55706 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-55706 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55706 exists.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as GHSA-rrgf-j5xj-h9hc.