How severe is CVE-2026-41278?

No CVSS score has been assigned to CVE-2026-41278 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-41278?

CVE-2026-41278 affects the following packages: flowise (npm). Ecosystems affected: npm.

How do I fix CVE-2026-41278?

Update flowise to 3.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41278 is resolved across your whole dependency graph.

How do I detect CVE-2026-41278 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for flowise, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-41278 if there is no patch (or I can't update yet)?

Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Is CVE-2026-41278 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-41278 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-41278?

CVE-2026-41278 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 36th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-41278?

CVE-2026-41278 is classified as Information Exposure (CWE-200). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-41278 published, and has it been updated?

CVE-2026-41278 was published on April 23, 2026 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-41278 — flowise

CVE-2026-41278 is a Information Exposure vulnerability in flowise. A fix is available for flowise — see the affected versions and patch details below.

Flowise: Public chatflow endpoints return unsanitized flowData including plaintext API keys, passwords, and credential IDs

Also known asGHSA-w47f-j8rh-wx87

Published

Apr 23, 2026

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-41278.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs36th percentile — riskier than 36% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

flowisenpm

9Kdownloads / week

Description

Summary

The GET /api/v1/public-chatflows/:id endpoint returns the full chatflow object without sanitization for public chatflows. Docker validation revealed this is worse than initially assessed: the sanitizeFlowDataForPublicEndpoint function does NOT exist in the released v3.0.13 Docker image. Both public-chatflows AND public-chatbotConfig return completely raw flowData including credential IDs, plaintext API keys, and password-type fields.

Root Cause

// packages/server/src/controllers/chatflows/index.ts:218-220
const chatflow = await chatflowsService.getChatflowById(req.params.id)
if (!chatflow) return res.status(StatusCodes.NOT_FOUND).json(...)
if (chatflow.isPublic) return res.status(StatusCodes.OK).json(chatflow) // ← NO sanitization!

Docker Validation (v3.0.13)

Created public chatflow with credential IDs and passwords in flowData:

{
  "flowData": "{\"nodes\":[{\"data\":{\"credential\":\"e92a39bf-...\",\"inputs\":{\"password\":\"sk-supersecretkey123\",\"apiKey\":\"should-not-leak\"}}}]}"
}

The sanitizeFlowDataForPublicEndpoint function only exists in unreleased HEAD, and even there, only public-chatbotConfig calls it — public-chatflows never does.

Impact

Credential IDs leaked — enables OAuth2 token theft chain (Finding 1)
Plaintext API keys and passwords leaked — direct third-party account compromise
Node configurations leaked — reveals internal architecture and endpoint URLs
Both public-chatflows and public-chatbotConfig are affected in the released version

Suggested Fix

Apply sanitization to both public endpoints:

const sanitized = sanitizeFlowDataForPublicEndpoint(chatflow)
return res.status(StatusCodes.OK).json(sanitized)

Ensure the sanitization function strips all credential, password, apiKey, and secretKey fields from flowData.

References

packages/server/src/controllers/chatflows/index.ts lines 209-236
packages/server/src/utils/sanitizeFlowData.ts lines 11-34 (exists only in unreleased HEAD)

Credits

Shinobi Security - https://github.com/shinobisecurity

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`flowise`	all versions	3.1.0`npm install flowise@3.1.0`

Affected Products

1 product · 1 configurations

Application

flowiseflowiseai

< 3.1.0

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for flowise, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update flowise to 3.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41278 is resolved across your whole dependency graph.
Workarounds
Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

### Summary The `GET /api/v1/public-chatflows/:id` endpoint returns the full chatflow object **without sanitization** for public chatflows. Docker validation revealed this is worse than initially assessed: the `sanitizeFlowDataForPublicEndpoint` function does NOT exist in the released v3.0.13 Docker image. Both `public-chatflows` AND `public-chatbotConfig` return completely raw flowData including credential IDs, plaintext API keys, and password-type fields. ### Root Cause ```typescript // packages/server/src/controllers/chatflows/index.ts:218-220 const chatflow = await chatflowsService.getC

O3 Security · Impact-Aware SCA

Is CVE-2026-41278 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works