PatchTheCVECVE-2026-66777: SAP Approuter does not sufficiently validate certain incoming requests before forwarding them to backend desti
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Routine
MEDIUM 5.9UPGRADE
CVE-2026-66777 is a medium-severity flaw (CVSS 5.9) affecting approuter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
SAP Approuter does not sufficiently validate certain incoming requests before forwarding them to backend destinations. Due to the complexity of the required conditions, an attacker with low privileges could send specially crafted requests to bypass authorization checks and reach protected resources beyond their assigned scope. Successful exploitation could allow the attacker to read sensitive data and perform limited modifications on protected re
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 63%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2026-08-11 |
| Last modified | 2026-10-23 |
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
sap approuter UPGRADE
Affected: < 23.0.0
Fixed in: 23.0.0
Safe to downgrade to: no unaffected older release
1. Check installed version
npm ls approuter
2. UPGRADE to 23.0.0
npm install approuter@">=23.0.0"
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-58230 HIGH 7.0 UPGRADE SAP Approuter does not sufficiently validate certain token content under specific configurations
- CVE-2026-58238 MEDIUM 5.9 UPGRADE SAP Approuter does not sufficiently handle certain requests under specific conditions
- CVE-2026-66778 MEDIUM 5.3 UPGRADE SAP Approuter does not sufficiently sanitize certain request headers before forwarding traffic to internal com
- CVE-2026-58237 MEDIUM 5.9 UPGRADE WebSocket of SAP Approuter does not perform sufficient authorization checks in certain functionality
- CVE-2026-58239 LOW 3.7 UPGRADE SAP Approuter does not sufficiently validate tenant context in inbound requests