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CVE-2026-105698

MEDIUM 5.4

Published 2026-10-05 · Last modified 2026-10-06

Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.0.0 until 1.10.1, Langflow did not verify flow ownership in the deprecated POST /api/v1/build/{flow_id}/vertices and POST /api/v1/build/{flow_id}/vertices/{vertex_id} handlers. Through version 1.7.1, an unauthenticated caller who knew another user's flow UUID could reach these handlers; from version 1.7.2 through 1.10.0, callers had to authenticate but needed no elevated privileges. Such a caller could cause retrieve_vertices_order to load and cache the private graph, enumerate its vertex identifiers, and use build_vertex to execute selected vertices and receive their results. build_graph_from_db_no_cache performed a primary-key lookup without an owner filter. This could disclose private flow structure, configured values, and selected outputs and could trigger victim-configured side effects and build-history records, although it did not expose the victim's variable-store credentials or permit modification of the stored flow. This issue is fixed in Langflow 1.10.1 and langflow-base 0.10.1.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 13th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.4CVSS 3.1 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Langflow Ai

Products Langflow Langflow Base

Weakness (CWE)

  • CWE-639: : Authorization Bypass Through User-Controlled Key
  • CWE-862: : Missing Authorization

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • langflow PyPI

    pkg:pypi/langflow

    ECOSYSTEM range
    • Introduced version (included): 1.0.0
    • Fixed boundary (excluded): 1.10.1
    82 explicitly listed affected versions

    1.0.0, 1.0.1, 1.0.10, 1.0.11, 1.0.12, 1.0.13, 1.0.14, 1.0.15, 1.0.16, 1.0.17, 1.0.18, 1.0.19, 1.0.19.post1, 1.0.19.post2, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.4.post1, 1.10.0, 1.10.0rc0, 1.10.1rc0, 1.10.1rc3, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.5.0, 1.5.0.post1, 1.5.0.post2, 1.5.1, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, 1.6.6, 1.6.7, 1.6.8, 1.6.9, 1.7.0, 1.7.1, 1.7.2, 1.7.3, 1.8.0, 1.8.0rc0, 1.8.0rc1, 1.8.0rc2, 1.8.0rc3, 1.8.0rc4, 1.8.0rc5, 1.8.0rc6, 1.8.1, 1.8.2, 1.8.3, 1.8.3rc0, 1.8.4, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.3rc0, 1.9.4, 1.9.5, 1.9.6, 1.9.6rc0

    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-gh98-4phw-6fmw/GHSA-gh98-4phw-6fmw.json"
  }
}
    GitHub Advisory Database · GHSA-gh98-4phw-6fmw · Updated 2026-10-15T14:56:14.908470119Z
  • langflow-base PyPI

    pkg:pypi/langflow-base

    ECOSYSTEM range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 0.10.1
    146 explicitly listed affected versions

    0.0.13, 0.0.14, 0.0.15, 0.0.16, 0.0.17, 0.0.18, 0.0.19, 0.0.20, 0.0.21, 0.0.22, 0.0.23, 0.0.24, 0.0.25, 0.0.26, 0.0.27, 0.0.28, 0.0.29, 0.0.30, 0.0.31, 0.0.32, 0.0.33, 0.0.34, 0.0.35, 0.0.36, 0.0.37, 0.0.38, 0.0.39, 0.0.40, 0.0.41, 0.0.42, 0.0.43, 0.0.44, 0.0.45, 0.0.46, 0.0.47, 0.0.48, 0.0.49, 0.0.50, 0.0.51, 0.0.52, 0.0.53, 0.0.54, 0.0.55, 0.0.56, 0.0.57, 0.0.58, 0.0.59, 0.0.60, 0.0.61, 0.0.62, 0.0.63, 0.0.64, 0.0.66, 0.0.67, 0.0.68, 0.0.69, 0.0.70, 0.0.71, 0.0.72, 0.0.73, 0.0.74, 0.0.75, 0.0.76, 0.0.77, 0.0.78, 0.0.79, 0.0.80, 0.0.81, 0.0.82, 0.0.83, 0.0.84, 0.0.85, 0.0.86, 0.0.87, 0.0.88, 0.0.89, 0.0.90, 0.0.91, 0.0.92, 0.0.93, 0.0.94, 0.0.95, 0.0.96, 0.0.97, 0.0.98, 0.0.99, 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.4.post1, 0.10.0, 0.10.0rc0, 0.10.1rc0, 0.10.1rc3, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.5.0, 0.5.0.post1, 0.5.0.post2, 0.5.1, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.6.7, 0.6.8, 0.6.9, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.8.0, 0.8.0rc0, 0.8.0rc1, 0.8.0rc2, 0.8.0rc3, 0.8.0rc4, 0.8.0rc5, 0.8.0rc6, 0.8.1, 0.8.2, 0.8.3, 0.8.3rc0, 0.8.4, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.3rc0, 0.9.4, 0.9.5, 0.9.6, 0.9.6rc0

    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-gh98-4phw-6fmw/GHSA-gh98-4phw-6fmw.json"
  }
}
    GitHub Advisory Database · GHSA-gh98-4phw-6fmw · Updated 2026-10-15T14:56:14.908470119Z
  • langflow PyPI

    pkg:pypi/langflow

    ECOSYSTEM range
    • Introduced version (included): 1.0.0
    • Fixed boundary (excluded): 1.10.1
    82 explicitly listed affected versions

    1.0.0, 1.0.1, 1.0.10, 1.0.11, 1.0.12, 1.0.13, 1.0.14, 1.0.15, 1.0.16, 1.0.17, 1.0.18, 1.0.19, 1.0.19.post1, 1.0.19.post2, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.4.post1, 1.10.0, 1.10.0rc0, 1.10.1rc0, 1.10.1rc3, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.5.0, 1.5.0.post1, 1.5.0.post2, 1.5.1, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, 1.6.6, 1.6.7, 1.6.8, 1.6.9, 1.7.0, 1.7.1, 1.7.2, 1.7.3, 1.8.0, 1.8.0rc0, 1.8.0rc1, 1.8.0rc2, 1.8.0rc3, 1.8.0rc4, 1.8.0rc5, 1.8.0rc6, 1.8.1, 1.8.2, 1.8.3, 1.8.3rc0, 1.8.4, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.3rc0, 1.9.4, 1.9.5, 1.9.6, 1.9.6rc0

    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/pypa/advisory-database/blob/main/vulns/langflow/PYSEC-2026-4234.yaml"
  }
}
    PyPA · PYSEC-2026-4234 · Updated 2026-10-15T14:56:14.908470119Z
  • langflow-base PyPI

    pkg:pypi/langflow-base

    ECOSYSTEM range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 0.10.1
    146 explicitly listed affected versions

    0.0.13, 0.0.14, 0.0.15, 0.0.16, 0.0.17, 0.0.18, 0.0.19, 0.0.20, 0.0.21, 0.0.22, 0.0.23, 0.0.24, 0.0.25, 0.0.26, 0.0.27, 0.0.28, 0.0.29, 0.0.30, 0.0.31, 0.0.32, 0.0.33, 0.0.34, 0.0.35, 0.0.36, 0.0.37, 0.0.38, 0.0.39, 0.0.40, 0.0.41, 0.0.42, 0.0.43, 0.0.44, 0.0.45, 0.0.46, 0.0.47, 0.0.48, 0.0.49, 0.0.50, 0.0.51, 0.0.52, 0.0.53, 0.0.54, 0.0.55, 0.0.56, 0.0.57, 0.0.58, 0.0.59, 0.0.60, 0.0.61, 0.0.62, 0.0.63, 0.0.64, 0.0.66, 0.0.67, 0.0.68, 0.0.69, 0.0.70, 0.0.71, 0.0.72, 0.0.73, 0.0.74, 0.0.75, 0.0.76, 0.0.77, 0.0.78, 0.0.79, 0.0.80, 0.0.81, 0.0.82, 0.0.83, 0.0.84, 0.0.85, 0.0.86, 0.0.87, 0.0.88, 0.0.89, 0.0.90, 0.0.91, 0.0.92, 0.0.93, 0.0.94, 0.0.95, 0.0.96, 0.0.97, 0.0.98, 0.0.99, 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.4.post1, 0.10.0, 0.10.0rc0, 0.10.1rc0, 0.10.1rc3, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.5.0, 0.5.0.post1, 0.5.0.post2, 0.5.1, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.6.7, 0.6.8, 0.6.9, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.8.0, 0.8.0rc0, 0.8.0rc1, 0.8.0rc2, 0.8.0rc3, 0.8.0rc4, 0.8.0rc5, 0.8.0rc6, 0.8.1, 0.8.2, 0.8.3, 0.8.3rc0, 0.8.4, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.3rc0, 0.9.4, 0.9.5, 0.9.6, 0.9.6rc0

    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/pypa/advisory-database/blob/main/vulns/langflow-base/PYSEC-2026-4238.yaml"
  }
}
    PyPA · PYSEC-2026-4238 · Updated 2026-10-15T14:56:14.908470119Z

All CVSS metrics

  • MEDIUM 5.4 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  • MEDIUM 5.4 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS