CVE-2026-5027

highpriority · track · 24EPSS 0.400 · 99 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

9 exploits · PoC

Likely / severe?

40.0% (99th) EPSS

CVSS 8.8 · high

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

The 'POST /api/v2/files' endpoint does not sanitize the 'filename' parameter from the multipart form data, allowing an attacker to write files to arbitrary locations on the filesystem using path traversal sequences ('../').

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · vulnreport@tenable.comexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US

exploits (9)

Public proof-of-concept and weaponised exploit code.

EDB-52659Langflow 1.8.4 - Path Traversal to Remote Code ExecutionPoC · exploit_db
0xBlackash/CVE-2026-5027CVE-2026-5027PoC · poc_in_github
EQSTLab/CVE-2026-5027Langflow, Remote Code Execution (RCE) via Cron Job Injection through Path TraversalPoC · poc_in_github
HORKimhab/CVE-2026-5027 CVE-2026-5027 - DraftPoC · poc_in_github
Layer-6/CVE-2026-5027-LangflowLayer-6/CVE-2026-5027-LangflowPoC · poc_in_github
min8282/CVE-2026-5027Langflow, Remote Code Execution (RCE) via Cron Job Injection through Path Traversal (CVE-2026-5027)PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

Open Source Langflowall versionscert_bundDEcpe:/a:langflow:langflow:-
langflow-ai langflow≤ 0enisa_euvdEU
langflow langflow< 1.9.0nvdUScpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0900Langflow: Mehrere SchwachstellenDeutsch2026-03-29csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Langflow ausnutzen, um Informationen offenzulegen, Daten zu manipulieren und Cross-Site-Scripting-Angriffe durchzuführen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-03-27modified 2026-08-18

references (4)

External citations — patches, advisories, analysis.

https://github.com/langflow-ai/langflow/releasesPatchcnnvd
https://www.tenable.com/security/research/tra-2026-26 cnnvd
https://www.tenable.com/security/research/tra-2026-26 enisa_euvd
https://www.tenable.com/security/research/tra-2026-26Vendor AdvisoryThird Party Advisorynvd

scry

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