CVE-2026-44745
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedSAP Approuter does not properly validate incoming request headers during the OAuth2 login flow under certain configurations. This allows an unauthenticated remote attacker to craft a malicious link which, when clicked by a victim, could lead to unauthorized access. Successful exploitation results in a high impact to the confidentiality and integrity with no impact on the availability of the application.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceSAP Approuter contains an improper input validation vulnerability in the OAuth2 login flow where incoming request headers are not properly validated under certain configurations. An unauthenticated attacker can craft malicious links that, when clicked by a victim, bypass authentication controls and grant unauthorized access to the application.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm SAP Approuter installationSearch your deployment artifacts (package.json, manifest.yml, or deployed application files) for the '@sap/approuter' module or 'approuter' componentAffected if SAP Approuter is present in your environment
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Identify installed SAP Approuter versionRun 'npm list @sap/approuter' in the project directory or check the package-lock.json file for the @sap/approuter version entryAffected if The installed version falls within the vulnerable version range (if known) or is unpatched
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Verify OAuth2 login flow is configuredInspect the approuter configuration files (xs-app.json, or default-env.json) and look for the 'routes' section with 'authenticationType: xsuaa' or OAuth2-related authentication settingsAffected if OAuth2/XSUAA authentication is enabled in the SAP Approuter configuration
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Inspect OAuth2 header validation settingsReview the authentication configuration in xs-app.json or the related security descriptor files for any custom header handling or proxy configuration that may bypass standard validationAffected if Non-standard header handling is configured or custom authentication headers are accepted without validation
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Check for vulnerable URL patterns in authentication flowReview application logs and access logs for unusual OAuth2 authorization request patterns, particularly URLs with unexpected headers or parameters in the /oauth/authorize endpointAffected if Requests with malformed headers reach the OAuth2 authorization endpoint without rejection
Your environment is affected if SAP Approuter with OAuth2 authentication is deployed and the version is unpatched, particularly if custom header handling or non-standard OAuth2 configurations are in use.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReview and harden OAuth2 configuration settings in SAP Approuter to ensure proper header validation; apply vendor patches when available and validate all incoming request headers during the authentication process.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,200.
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Free · runs locallyCheck whether your project pulls in CVE-2026-44745 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-44745 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data