Affects SAP Approuter — widely used enterprise software. Unauthenticated request smuggling can expose user data and cause outages, posing broad organizational risk.
CVE-2026-27690
Unauthenticated HTTP request smuggling in SAP Approuter causing data exposure and outages.
Is CVE-2026-27690 being exploited?
Not confirmed. CVE-2026-27690 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.68% probability of exploitation in the next 30 days.
How severe is CVE-2026-27690?
CVE-2026-27690 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-27690?
Yes. A fix has been recorded for CVE-2026-27690. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27690 affect?
CVE-2026-27690 affects SAP Approuter, SAP BTP components using Approuter. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27690?
Apply vendor patch when released; implement WAF rules, restrict Approuter access, and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated HTTP request smuggling enabling response disclosure of user data and service denial (DoS).
Immediate action required
- affected< 20.10.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.