CVE-2026-34257
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 · uneditedDue to an Open Redirect vulnerability in SAP NetWeaver Application Server ABAP, an unauthenticated attacker could craft malicious URL that, if accessed by a victim, they could be redirected to the page controlled by the attacker. This causes low impact on confidentiality and integrity of the application with no impact on availability.
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 confidenceOpen Redirect vulnerability in SAP NetWeaver Application Server ABAP allows unauthenticated attackers to craft malicious URLs that redirect victims to attacker-controlled pages, enabling phishing attacks.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 700= 701= 702= 731= 740= 750= 752= 753= 754= 755= 756= 757CVSS 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
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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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Identify installed SAP NetWeaver AS ABAP versionExecute transaction code 'SM51' or use SAP MII version checker to determine the exact release version of the SAP NetWeaver Application Server ABAP installationAffected if The installed version matches any of these: 700, 701, 702, 731, 740, 750, 752, 753, 754, 755, 756, or 757
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Confirm HTTP(s) web entry points are enabledCheck transaction code 'SICF' or examine the ICM (Internet Communication Manager) configuration via transaction 'SMICM' to determine if HTTP/HTTPS services are active for the AS ABAPAffected if HTTP or HTTPS services are exposed and accessible from the network
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Identify URL redirect parameter handlingReview web applications or transaction codes that accept URL parameters (such as 'url', 'redirect', 'target', or 'dest') and perform redirects. Check transaction 'SE80' or examine custom BSP applications and Web Dynpro components that may process redirect parametersAffected if Any application or transaction accepts user-supplied redirect parameters without validated trusted domain checking
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Audit redirect validation logicSearch ABAP code using transaction 'ESEARCH' or 'CODE_SCANNER' for patterns like 'CALL METHOD cl_http_utilities=>set_location' or 'CONCATENATE' operations that construct redirect URLs from request parametersAffected if Code exists that constructs redirect URLs from user-controlled parameters without whitelisting trusted domains
Your environment is affected if it runs SAP NetWeaver AS ABAP versions 700-757, has HTTP/HTTPS services enabled, and processes redirect parameters in web-facing applications without strict domain validation.
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 dataImplement strict validation of redirect parameters to ensure URLs only redirect to trusted, whitelisted domains; validate all user-supplied redirect targets before processing.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-34257 — 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-2026-34257 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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- Version or environment caveats, and links to real fixes
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