CVE-2026-61592 djust: SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack)
Attackers can hijack SSE sessions by guessing client-chosen IDs, executing actions as the victim due to missing user binding.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-61592?
CVE-2026-61592 is a high-severity missing authorization vulnerability in djust-org djust, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
djust provides Phoenix LiveView-style reactive server-side rendering for Django with Rust-powered performance. Prior to version 1.0.7, SSE sessions were keyed solely by a client-chosen `session_id` with no binding to the authenticated user — a control the WebSocket transport has but that was dropped on SSE. An attacker who learns (or a victim who leaks) a `session_id` could connect to the message endpoint and dispatch event handlers that execute with the victim's identity and state. This is fixed in djust 1.0.7. Each SSE session is bound to its owning principal at creation and cross-principal access is rejected; SSE session creation is additionally capped per principal. As a workaround, disable the SSE transport.
Which versions are affected by CVE-2026-61592?
3 open source packages ship an affected version, including djust.
| Package | Affected | Fixed in |
|---|---|---|
djust PyPI | All versions | 1.0.7 |
djust PyPI | All versions | 1.0.7 |
djust PyPI | All versions | 1.0.7 |
How do I fix CVE-2026-61592?
Upgrade djust to 1.0.7 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-61592 being exploited?
There is no known exploitation of CVE-2026-61592 in the wild and no public exploit code.
Sources
Also known as GHSA-f795-p5jw-j6g2, PYSEC-2026-4043.