CVE-2026-97875: DNS rebinding vulnerability in rojo serve HTTP API

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-25 · updated 2026-09-30
Weakness: CWE-350

Description

Rojo's "rojo serve" HTTP API (default port 34872) has no Host/Origin header validation, making it vulnerable to DNS rebinding. A malicious webpage can read all project source, write malicious code to files on disk, and launch local programs via opener::open() with no user interaction beyond visiting the page.

Affected products

rojo-rbx rojo: before 7.7.0 — fixed in 7.7.0

How to fix

Upgrade to a fixed version: rojo-rbx rojo 7.7.0. Check the vendor advisory for mitigations.

References

https://github.com/rojo-rbx/rojo/pull/1270
https://osv.dev/vulnerability/RUSTSEC-2026-0279
https://rustsec.org/advisories/RUSTSEC-2026-0279.html

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