CVE-2026-66767 Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Platform
Unauthenticated attackers can hijack user sessions via a race condition in SAP NetWeaver ABAP, compromising confidentiality and integrity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66767?
CVE-2026-66767 is a high-severity vulnerability in SAP_SE SAP NetWeaver Application Server for ABAP and ABAP Platform, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user's session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.
Weakness: CWE-191
Which versions are affected by CVE-2026-66767?
How do I fix CVE-2026-66767?
No fix has been published for CVE-2026-66767 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66767 being exploited?
There is no known exploitation of CVE-2026-66767 in the wild and no public exploit code.
Sources
Also known as GHSA-42j4-4hwf-257g.