CVE-2019-4437
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 · uneditedIBM API Connect 2018.1 through 2018.4.1.6 may inadvertently leak sensitive details about internal servers and network via API swagger. IBM X-force ID: 162947.
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 confidenceIBM API Connect versions 2018.1 through 2018.4.1.6 contains a flaw where the API swagger (OpenAPI) documentation inadvertently exposes sensitive internal server and network infrastructure details that should remain confidential.
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>= 2018.1.0, <= 2018.4.1.6CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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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Determine IBM API Connect installed versionUse IBM API Connect management console or run 'apic status' or 'apic version' command from the CLI to retrieve the installed version numberAffected if Version falls within 2018.1.0 through 2018.4.1.6 range
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Identify API swagger documentation endpointsLocate all published API swagger or OpenAPI definition endpoints in your API Connect environment - typically accessible via /swagger, /api-docs, or the API Manager portalAffected if Swagger documentation endpoints exist and are reachable
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Check if swagger docs are publicly accessibleVerify whether swagger/OpenAPI documentation is exposed to unauthenticated or public users by attempting access from an external network without credentialsAffected if Public or unauthenticated access to swagger documentation is allowed
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Inspect swagger definitions for internal network informationReview the API swagger (OpenAPI) JSON or YAML definitions for exposed internal IP addresses, internal hostnames, private network paths, or internal server URLs that should remain confidentialAffected if Internal server details, private IP addresses, internal hostnames, or network infrastructure information is present in the API swagger documentation
You are affected if IBM API Connect version is between 2018.1.0 and 2018.4.1.6 AND your API swagger documentation is publicly accessible AND contains internal network or server infrastructure details.
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 dataApply the IBM fix for this vulnerability (upgrade to a patched version) or restrict public access to API swagger documentation and audit API definitions to remove any internal network information.
- Consultation3.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,168.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-4437 — 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-2019-4437 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