Vulnerability · Published Sep 16, 2026 · Assigned by GitHub_M
CVE-2026-61592djust: SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack)
High 7.4
In plain English
A high-severity session fixation in djust from djust-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | djust | 1.0.7 | GHSA-f795-p5jw-j6g2 |
| PyPI | djust | 1.0.7 | PYSEC-2026-4043 |
Affected products (as reported)
Weakness: CWE-384, CWE-639, CWE-862 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/djust-org/djust/security/advisories/GHSA-f795-p5jw-j6g2 x_refsource_CONFIRM
- https://github.com/djust-org/djust/releases/tag/v1.0.7 x_refsource_MISC