CVE-2026-6597Network attack vector

Authenticated credential exposure via incomplete API-key redaction

Published Apr 20, 2026 · Updated Apr 20, 2026

Credential exposure in Langflow OSS 1.8.0 through 1.8.3 allows remote authenticated users to read API keys through flow API responses. The remove_api_keys and has_api_terms logic incompletely identifies credential-bearing flow fields, leaving some values unredacted in API output. Exploitation requires high-privilege access and reveals only credentials present in affected flow data; no modification or service interruption is reported.

CVSS severity2.7
Low
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Credential exposure in Langflow OSS 1.8.0 through 1.8.3 allows remote authenticated users to read API keys through flow API responses. The remove_api_keys and has_api_terms logic incompletely identifies credential-bearing flow fields, leaving some values unredacted in API output. Exploitation requires high-privilege access and reveals only credentials present in affected flow data; no modification or service interruption is reported.

The record

CVE
CVE-2026-6597
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
OpenBMC Project
Product
Langflow OSS
Classifications
CWE-256, T1552
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.8.0
  2. Affected versionversion=1.8.1
  3. Affected versionversion=1.8.2
  4. Affected versionversion=1.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenBMC Project · Langflow OSSversion=1.8.0; version=1.8.1; version=1.8.2; version=1.8.3

Published CVSS scores

2.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
3.3VulDBAV:N/AC:L/Au:M/C:P/I:N/A:N
2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-256Plaintext Storage of a Password
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo