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Fencer Vulns
medium 6.1

CVE-2026-55423 json

Langflow: Logout button does not clear session

published 2026-06-19 4 mo ago modified 2026-10-25 14 d ago also GHSA-7hw8-6q6r-4276 , PYSEC-2026-222 , EUVD-2026-38516

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi langflow 1.7.0
  • langflow langflow 1.7.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/langflow-ai/langflow/pull/10528 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/langflow-ai/langflow/security/advisories/GHSA-7hw8-6q6r-4276 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 6.1 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
pypi langflow
<1.7.0
1.7.0

Affected products

  • langflow-ai langflow

Classification

Weakness
  • CWE-613 DEPRECATED: Insufficient Session Expiration

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.