Is CVE-2026-5027 actively exploited?

Yes. CVE-2026-5027 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2026-5027 be exploited remotely?

Yes. CVE-2026-5027 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5027?

CVE-2026-5027 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-5027

HIGHCISA KEVIN THE WILD

CVE-2026-5027

CWE-22Published: March 27, 2026· Updated: Mar 30, 2026

8.8

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:16.7th

Official Description

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 ('../').

NVD Source

Technical Analysis

CVE-2026-5027 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CISA has added CVE-2026-5027 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

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News & Research Mentioning CVE-2026-5027

Path traversal flaw in AI dev platform Langflow exploited in attacks

BleepingComputer· Jun 10, 2026

Attackers are actively exploiting CVE-2026-5027, a high-severity path traversal vulnerability in the AI development platform Langflow, to write arbitrary files on exposed servers. [...] [xlite_meta score:58 src:BleepingComputer xlite_fp:606a4f4387068c647346389fce0611fd037a36851c563197eab298811ef94334]

Langflow Vulnerability CVE-2026-5027 Exploited for Unauthenticated RCE

The Hacker News· Jun 10, 2026

A high-severity security flaw in Langflow, an open-source low-code platform to build artificial intelligence (AI) applications, has come under active exploitation in the wild, according to findings from VulnCheck. The vulnerability in question is CVE-2026-5027 (CVSS score: 8.8), a case of path traversal that could allow an attacker to write files to arbitrary locations. "The 'POST /api/v2/ [xlite_meta score:37 src:The Hacker News xlite_fp:764adeb33713c09b15e954f5b2ff29a5ffaf9a855622169d04e295ce8d269b80]