---
title: "CVE-2026-53649: Joro: Unauthenticated Cross-Origin Plugin Upload Leads to RCE"
url: https://erroneo.us/security/cve/CVE-2026-53649/
description: "CVE-2026-53649 (github.com/BishopFox/joro (Go)): Joro is a web exploitation framework. Prior to version 1.1.1, Joro's default proxy mode exposes a local API…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-02
date_modified: 2026-09-04
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-53649"
kev: false
cvss: 9.6
epss: 0.0033
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-53649: Joro: Unauthenticated Cross-Origin Plugin Upload Leads to RCE

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.3% , percentile 25: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 25% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes github.com/BishopFox/joro (Go) < 0.0.0-20260601151442-5c0ca35db828, fixed in 0.0.0-20260601151442-5c0ca35db828 . Check your lockfile, including transitive dependencies.

## What it is

Joro is a web exploitation framework. Prior to version 1.1.1, Joro's default proxy mode exposes a local API on 127.0.0.1:9090 that performs no authentication and applies a wildcard CORS policy. Because plugin uploads use the CORS-safelisted multipart/form-data content type, cross-origin JavaScript on any page the operator visits can reach privileged endpoints - including uploading a native plugin and triggering a restart - directly through the operator's browser, with no preflight or credentials. Since plugins execute on load, this yields unauthenticated remote code execution as the operator's user from a single page visit. This issue has been patched in version 1.1.1.

## Affected packages

- Go `github.com/BishopFox/joro` < 0.0.0-20260601151442-5c0ca35db828 → fixed: 0.0.0-20260601151442-5c0ca35db828

## Affected products (CVE record)

- BishopFox joro: < 1.1.1

## Severity

- GitHub_M CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.33% probability of exploitation activity in the next 30 days; percentile 25.

## Sources

- [GitHub Advisory GHSA-xqhv-chqm-fhcc](https://github.com/advisories/GHSA-xqhv-chqm-fhcc)
- [CVE.org record CVE-2026-53649](https://www.cve.org/CVERecord?id=CVE-2026-53649)
- [NVD entry CVE-2026-53649](https://nvd.nist.gov/vuln/detail/CVE-2026-53649)
- [github.com](https://github.com/BishopFox/joro/security/advisories/GHSA-xqhv-chqm-fhcc)
- [github.com](https://github.com/BishopFox/joro/releases/tag/1.1.1)

---
Source page: https://erroneo.us/security/cve/CVE-2026-53649/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt