Vulnerability record/PUBLISHED/Published Nov 11, 2026 18:11:17 UTC

CVE-2026-126771

OpsTree REMS through 1.0.0 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject scripts by uploading attachments with spoofed text/html Content-Type. Attackers can upload HTML files named like test.html.pdf that render in the REMS origin via Preview, executing JavaScript in victims' browsers.

Base score5.1/ 10

SeverityMediumCVSS 4.0

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityLowAC

Attack requirementsNoneAT

Privileges requiredLowPR

User interactionPassiveUI

Vulnerable system confidentialityLowVC

Vulnerable system integrityLowVI

Vulnerable system availabilityNoneVA

Subsequent system confidentialityLowSC

Subsequent system integrityLowSI

Subsequent system availabilityNoneSA

CVSS vector stringCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering AuthorityVulnCheck

Last updatedNov 11, 2026 18:11:17 UTC

PublishedNov 11, 2026 18:11:17 UTC

ReservedNov 11, 2026 18:05:56 UTC

Credits

Neel Saurabh Kotnis