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CVE-2026-34417

OSCAL-GUI Reflected XSS via project parameter in oscal-forms.php

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
NVD MITRE
6.1CVSS
MEDIUM

OSCAL-GUI contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser by injecting malicious content through the project request parameter in oscal-forms.php. The parameter value is URL-decoded and assigned to the project_id variable without sanitization in oscal-functions.php, and when the supplied project ID is not found, the unsanitized value is concatenated into an error message via the Messages() function and reflected into the HTML response body without encoding.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None

Weaknesses

CWE-79

Affected Products

OSCAL-GUI
brian-ruf

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://gist.github.com/cyberinforepo/5a8d369a005826b6b42bfeed9607c2dd
gist.github.com
https://www.vulncheck.com/advisories/oscal-gui-reflected-xss-via-project-parameter-in-oscal-forms-php
vulncheck.com

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026

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