CVE-2026-66766 Denial of Service (DoS) in SAP S/4HANA (Manage Supply Protection)
An unauthenticated attacker can cause a denial of service in SAP S/4HANA by triggering a Regular Expression Denial of Service in a third-party component.
- 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-2026-66766?
CVE-2026-66766 is a high-severity denial of service vulnerability in SAP_SE SAP S/4HANA (Manage Supply Protection), published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SAP S/4HANA (Private Cloud) uses a third-party component that contains a Regular Expression Denial of Service (ReDoS) vulnerability. An unauthenticated attacker could supply specially crafted input that triggers excessive processing within the affected functionality. Successful exploitation could exhaust system resources and make the service unavailable, resulting in a high impact on availability. There is no impact on confidentiality and integrity.
Weakness: CWE-1333
Which versions are affected by CVE-2026-66766?
How do I fix CVE-2026-66766?
No fix has been published for CVE-2026-66766 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-66766 being exploited?
There is no known exploitation of CVE-2026-66766 in the wild and no public exploit code.
Sources
Also known as GHSA-g76p-cfx7-wh4j.