CVE-2026-57736
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 · uneditedInsertion of Sensitive Information Into Sent Data vulnerability in HubSpot allows Retrieve Embedded Sensitive Data. This issue affects HubSpot: from n/a through 11.3.51.
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 confidenceThis is a CWE-201 (Insertion of Sensitive Information Into Sent Data) vulnerability in HubSpot that allows attackers to retrieve embedded sensitive data. The vulnerability exists in versions up to and including 11.3.51, where sensitive information is being inadvertently included in data transmissions.
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
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
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 HubSpot deployment in your environmentIdentify whether HubSpot software, integrations, or connected HubSpot services are in use within your infrastructure.Affected if HubSpot is not present in your environment, this CVE does not apply.
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Determine the installed HubSpot versionLocate and retrieve the version number of the HubSpot instance or integration in use. This may be found in the product UI, administrative dashboard, or via API endpoint that exposes version information.Affected if The version is 11.3.51 or lower. Versions higher than 11.3.51 are not affected.
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Inspect outbound data transmissions for sensitive contentExamine outgoing API calls, webhooks, form submissions, or data sync operations originating from HubSpot. Review payload contents for embedded sensitive information such as credentials, tokens, PII, or internal identifiers.Affected if Sensitive data is present in outbound transmissions. The vulnerability requires that sensitive information is actually being sent.
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Review HubSpot data integration and sync configurationsCheck configured data flows, third-party integrations, or automation workflows that connect HubSpot to external systems. Identify any custom fields or data mappings that may inadvertently include sensitive attributes in outgoing data.Affected if Integration configurations allow sensitive fields to be transmitted to external destinations.
You are affected if your environment uses HubSpot version 11.3.51 or lower and sensitive data is being transmitted in outbound data flows from the system.
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 dataUpgrade to a version beyond 11.3.51 once available, or contact HubSpot support for patch information. Review data flows to identify and remove any sensitive data from being embedded in outgoing transmissions.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57736 — 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-2026-57736 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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