Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-17627

CVE-2026-17627HIGH

IBM Langflow OSS — Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  L  N    7.1   .0020    8.8     —

AFFECTED
  Product       Versions  Fixed
  Langflow OSS  1.0.0 –   —

TIMELINE
  Jul 27  Reserved by ibm
  Sep 4   Published (CNA: ibm)
  Sep 9   RESCORED — CVE-2026-17627 (IBM Langflow OSS). CVSS 4.9 → 7.1 (NVD).

CWE-639 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 27, 2026	Reserved	Reserved by ibm
September 4, 2026	Published	Published (CNA: ibm)
September 9, 2026	RESCORED	RESCORED — CVE-2026-17627 (IBM Langflow OSS). CVSS 4.9 → 7.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	Langflow OSS	—	1.0.0	—

Weaknesses

CWE-639

References (1)

https://www.ibm.com/support/pages/node/7286294 [Vendor Advisory]

Authoritative record: CVE-2026-17627 at cve.org

Vendors: ibm

Weaknesses: CWE-639

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-17627 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.