PatchTheCEVCVE-2026-66778: SAP Approuter does not sufficiently sanitize certain request headers before forwarding traffic to internal com
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Routine
MEDIUM 5.3REMOTEUPGRADE
CVE-2026-66778 is a medium-severity flaw (CVSS 5.3) 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 sanitize certain request headers before forwarding traffic to internal components. An unauthenticated attacker could send a specially crafted request to obtain limited unauthorized access to information. This results in a low impact on confidentiality. There is no impact on integrity and availability.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 72%) |
| CISA exploited list | No |
| Weakness | CWE-644 |
| 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"
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
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-2026-66777 MEDIUM 5.9 UPGRADE SAP Approuter does not sufficiently validate certain incoming requests before forwarding them to backend desti
- 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