# CVE-2026-78372: RansomLook Missing Authorization Allows Disclosure of Private Group and Ransom Note Data

> Unauthenticated attackers can access private group and ransom note data via missing authorization checks in RansomLook web views and APIs.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-3r47-x6xh-cmv8

## What is CVE-2026-78372?

CVE-2026-78372 is a critical missing authorization vulnerability in ransomlook, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RansomLook does not consistently 
enforce authorization checks when accessing groups, markets, and ransom 
notes marked as private. An unauthenticated or otherwise unauthorized 
remote attacker can access information associated with private entities 
through several web views and API endpoints.

The affected functionality can 
disclose private group or market names, ransom-note content, and 
metadata associated with private groups. The /compare
 functionality can also be queried directly with the name of a private 
entity, allowing an unauthorized user to retrieve information such as 
post counts, mirror totals, and uptime even when the entity is excluded 
from the normal user interface. The patch explicitly adds a privacy 
check before returning this information. 

Ransom-note views, search results, 
and API endpoints were similarly missing consistent filtering. The fix 
introduces normalized private-group identifiers and alias handling, then
 rejects or filters notes associated with private groups before 
returning them to unauthorized callers.  

An attacker can exploit the issue 
remotely without authentication or user interaction, resulting in 
disclosure of information that was explicitly intended to be restricted 
to authorized users.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-78372?


## How do I fix CVE-2026-78372?

No fix has been published for CVE-2026-78372 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78372 being exploited?

There is no known exploitation of CVE-2026-78372 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78372 and fix it if it is affected.

What it is: CVE-2026-78372 is a critical missing authorization vulnerability in ransomlook, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-78372 in the wild and no public exploit code.

Affected product: ransomlook. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-78372/ (Markdown: https://insights.sbomify.com/CVE-2026-78372/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78372
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78372
- OSV: https://osv.dev/vulnerability/CVE-2026-78372

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78372/
Summaries are generated and may contain mistakes; the official description above is the record.