CVE-2026-55423

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.7.0, the logout button does not clear the session. The previous user stays logged in unless another user explicitly logs in. This vulnerability is fixed in 1.7.0.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
4.7%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 24, 2026

Advisory Details (3)

Auto-updated Jun 23, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github.
github Patch Available🟡 PoC Available

Logout button does not clear session · Advisory · langflow-ai/langflow · GitHub

https://github.com/langflow-ai/langflow/security/advisories/GHSA-7hw8-6q6r-4276
github_pr

fix: Clear auto-login cookie on logout

Fix merged in langflow-ai/langflow PR #10528 on 2025-11-12 — awaiting tagged release

https://github.com/langflow-ai/langflow/pull/10528
github_pr

fix: match cookie parameters when deleting cookies in logout endpoint

Fix merged in langflow-ai/langflow PR #10527 on 2025-11-12 — awaiting tagged release

https://github.com/langflow-ai/langflow/pull/10527

Vendor Advisories for CVE-2026-55423(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
langflow0.0.31 ... 1.7.0 (277 versions)1.7.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 05:24 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 06:20 UTCEG score recompute
  5. 2026-07-05 06:51 UTCEG score recompute
  6. 2026-07-05 02:31 UTCEPSS rescore
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 07:49 UTCEG score recompute
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 07:30 UTCEG score recompute
  12. 2026-07-02 08:30 UTCEG score recompute
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-07-01 09:30 UTCEG score recompute
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-30 10:30 UTCEG score recompute
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 11:30 UTCEG score recompute
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 12:29 UTCEG score recompute
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-27 13:30 UTCEG score recompute
  25. 2026-06-27 03:08 UTCEPSS rescore
Show 10 more
  1. 2026-06-26 14:30 UTCEG score recompute
  2. 2026-06-25 15:28 UTCEG score recompute
  3. 2026-06-25 13:49 UTCEPSS rescore
  4. 2026-06-24 16:26 UTCEG score recompute
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 17:25 UTCEG score recompute
  7. 2026-06-22 18:26 UTCEG score recompute
  8. 2026-06-21 19:25 UTCEG score recompute
  9. 2026-06-20 20:24 UTCEG score recompute
  10. 2026-06-19 21:23 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55423?
CVE-2026-55423 is a medium vulnerability published on June 19, 2026. Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.7.0, the logout button does not clear the session. The previous user stays logged in unless another user explicitly logs in. This vulnerability is fixed in 1.7.0.
When was CVE-2026-55423 disclosed?
CVE-2026-55423 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on June 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55423 actively exploited?
CVE-2026-55423 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55423?
CVE-2026-55423 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-55423?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55423, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-55423

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