FileRun up to 2026.2.1 PhotoProofSheet Endpoint escapeshellarg os command injection

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.98+

Summaryinfo

A vulnerability identified as very critical has been detected in FileRun. Impacted is the function escapeshellarg of the component PhotoProofSheet Endpoint. This manipulation causes os command injection. This vulnerability is tracked as CVE-2026-73693. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in FileRun and classified as very critical. Affected by this vulnerability is the function escapeshellarg of the component PhotoProofSheet Endpoint. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FileRun before 2026.3.0 contains an OS command injection vulnerability in the PhotoProofSheet handler that allows authenticated users with upload permission to execute arbitrary commands by uploading files with shell metacharacters in their names. Attackers can upload a file containing command substitution syntax such as backticks, semicolons, or $() sequences in the filename, then trigger the PhotoProofSheet endpoint to execute arbitrary commands as the web-server user due to missing escapeshellarg() sanitization in the ImageMagick montage command construction.

The weakness was disclosed by Valentin Lobstein. It is possible to read the advisory at vulncheck.com. This vulnerability is known as CVE-2026-73693 since 08/13/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/10/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 2026.3.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FileRun 2026.3.0

Timelineinfo

08/13/2026 CVE reserved
09/10/2026 +28 days Advisory disclosed
09/10/2026 +0 days VulDB entry created
09/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: vulncheck.com
Researcher: Valentin Lobstein
Status: Confirmed

CVE: CVE-2026-73693 (🔒)
GCVE (CVE): GCVE-0-2026-73693
GCVE (VulDB): GCVE-100-402187

Entryinfo

Created: 09/10/2026 20:28
Changes: 09/10/2026 20:28 (76)
Complete: 🔍
Cache ID: 216::103

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