CVE-2026-17459

perwendel spark SparkJava ExternalResourceHandler.jav staticFiles.externalLocation symlink

State: Published
Severity: 5.3 Medium
Published: Jul 26, 2026
Updated: Jul 27, 2026
Reserved: Jul 25, 2026

Description

A vulnerability was determined in perwendel spark up to 2.9.4. This vulnerability affects the function staticFiles.externalLocation of the file src/main/java/spark/resource/ExternalResourceHandler.jav of the component SparkJava. Executing a manipulation can lead to symlink following. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P	VulDB
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R	VulDB
3.0	4.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R	VulDB
2.0	4.0 Medium	AV:N/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-61 Symlink Following
CWE-59 Link Following

Affected Products

Product	Versions
sparkperwendel	2.9.0Affected 2.9.1Affected 2.9.2Affected 2.9.3Affected 2.9.4Affected

References

VDB-383321 | perwendel spark SparkJava ExternalResourceHandler.jav staticFiles.externalLocation symlinkvdb-entrytechnical-description
VDB-383321 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-17459 | CVE Analysis and Reportthird-party-advisory
Submit #862468 | GitHub spark V 2.9.4 SparkJava External Static Files Symlink Escape Allows Local Filethird-party-advisory
https://github.com/perwendel/spark/issues/1296exploitissue-tracking
https://github.com/perwendel/spark/product

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