CVE-2026-85684

marker through 2.0.0 Path Traversal via upload filename

Published Sep 4, 2026 CVSS 4.0 · 8.8 High EPSS 1.1% KEV · Not listed

Description

marker through 2.0.0 contains a path traversal vulnerability in the FastAPI /marker/upload handler that fails to sanitize the file.filename parameter. Unauthenticated attackers can supply filenames containing directory traversal sequences to write arbitrary files to any location or delete existing files on the system.

Analysis

Technical impact

Marker up to version 2.0.0 contains a path traversal flaw in the FastAPI /marker/upload handler. The server fails to sanitize the file.filename parameter, allowing an unauthenticated attacker to supply filenames that traverse directories. This flaw permits the attacker to upload files to arbitrary locations on the host filesystem or delete existing files, creating a serious risk of remote code execution, data loss, and denial of service.

Affected Systems

The vulnerability affects the datalab-to Marker application, specifically all releases up to and including version 2.0.0. No other versions are currently listed as affected.

Risk and Exploitability

The CVSS score of 8.8 indicates a high severity. Because the exploit requires only an unauthenticated HTTP request and the payload is simple, the likelihood of exploitation is high. The EPSS score is unavailable, and the vulnerability is not listed in the CISA KEV catalog, but the combination of high CVSS and path traversal susceptibility suggests that attackers could readily target any exposed instance of Marker.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

datalab-to

marker

unaffected

Version	Status	Constraints
`0`	affected	≤ 2.0.0

No data.

Vendor Product Versions

Datalab-to

Marker

Version	Status	Scheme	Platform
`[0,2.0.0]`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Marker to the latest release that includes the path traversal fix.
Restrict access to the /marker/upload endpoint to authenticated users only and implement strict validation of the file.filename field, rejecting any path traversal sequences.
Configure the application or underlying operating system to limit the process's file system permissions, ensuring it can only write to a dedicated upload directory and cannot delete arbitrary files.

Generated by OpenCVE AI on September 4, 2026 at 16:00 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 1.1% (1.104% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/datalab-to/marker
https://github.com/datalab-to/marker/blob/v2.0.0/marker/scripts/server.py
https://github.com/datalab-to/marker/issues/1047
https://www.vulncheck.com/advisories/marker-through-2.0.0-path-traversal-via-upload-filename

History

Sep 9, 2026 10:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 4, 2026 4:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Datalab-to Datalab-to marker
Vendors & Products		Datalab-to Datalab-to marker

Sep 4, 2026 2:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		marker through 2.0.0 contains a path traversal vulnerability in the FastAPI /marker/upload handler that fails to sanitize the file.filename parameter. Unauthenticated attackers can supply filenames containing directory traversal sequences to write arbitrary files to any location or delete existing files on the system.
Title		marker through 2.0.0 Path Traversal via upload filename
Weaknesses		CWE-73
References		https://github.com/datalab-to/marker https://github.com/datalab-to/marker/blob/v2.0.0/marker/scripts/server.py https://github.com/datalab-to/marker/issues/1047 https://www.vulncheck.com/advisories/marker-through-2.0.0-path-traversal-via-upload-filename
Metrics		cvssV3_1 `{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}` cvssV4_0 `{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}`