CVE-2026-55423 json
Langflow: Logout button does not clear session
published 4mo ago modified 17d 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
Is CVE-2026-55423 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-11).
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
-
github.com
/langflow-ai/langflow/pull/10527
web, issue-tracking, patch
-
github.com
/langflow-ai/langflow/pull/10528
web, issue-tracking, exploit, report
-
github.com
/langflow-ai/langflow/security/advisories/GHSA-7hw8-6q6r-4276
web, vendor-advisory, exploit, patch
-
nvd.nist.gov
/vuln/detail/CVE-2026-55423
advisory
-
github.com
/langflow-ai/langflow
package
-
github.com
/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-222.yaml
web
Sources
- CVE List CVE-2026-55423
- GitHub Advisory GHSA-7hw8-6q6r-4276
- NVD CVE-2026-55423
- OSV PYSEC-2026-222
Fencer Intel 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.