Security readout for executives and security teams
Plain-English summary
IBM Langflow OSS login protections can permit excessive authentication attempts, increasing the risk that remote attackers compromise user accounts. Successful compromise could expose sensitive data and allow unauthorized changes. The supplied CVSS score is 9.1, making internet-accessible or otherwise untrusted-access deployments urgent to address.
Executive priority
Treat affected, externally accessible deployments as an immediate remediation priority. Confirm ownership, exposure, and version promptly, then apply IBM's guidance. Investigate suspicious authentication activity and consider credential rotation where compromise cannot be excluded.
Technical view
CVE-2026-19297 is a CWE-307 insufficient authentication-attempt restriction affecting IBM Langflow OSS 1.0.0 through 1.9.6. The login endpoint is remotely reachable without prior privileges or user interaction. The CVSS vector indicates high confidentiality and integrity impact, but no direct availability impact.
Likely exposure
Deployments running Langflow OSS 1.0.0 through 1.9.6 are potentially affected. Risk is greatest where the login endpoint is internet-facing, accessible from untrusted networks, or protects accounts using weak or reused passwords. The bundle does not establish how many deployments are exposed.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not listed as KEV. Exploitation would depend on repeated authentication attempts eventually obtaining valid account access. No public proof-of-concept or observed campaign is established by the supplied evidence.
Researcher notes
The weakness is categorized as CWE-307. The affected range is stated as 1.0.0 through 1.9.6, although the structured affected data lists endpoint CPEs rather than every intermediate version. The supplied bundle labels IBM's reference as a patch advisory but does not name the fixed version, so remediation must be confirmed there.
Mitigation direction
- Review IBM's advisory and apply its specified patched release or remediation.
- Restrict login endpoint access to trusted networks until remediation is complete.
- Require strong, unique credentials and rotate passwords suspected of exposure.
- Monitor and alert on excessive failed logins and unusual successful authentications.
- Enable additional authentication controls where supported and documented by IBM.
Validation and detection
- Inventory Langflow OSS deployments and record their exact versions.
- Identify whether each login endpoint is reachable from internet or untrusted networks.
- Confirm the installed version matches IBM's remediated guidance.
- Verify authentication-attempt restrictions using authorized, non-disruptive security testing.
- Review logs for repeated failures followed by successful or anomalous access.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-307: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-19297 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2ibmVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/7283558CVE reference, ibm · vendor-advisory, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Excessive Authentication Attempts
Improper Restriction of Excessive Authentication Attempts represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.