CVE-2026-61592: djust SSE Sessions Are Not Bound Vulnerability

HIGH
Advisory Identifier: GHSA-f795-p5jw-j6g2
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CVSS 7.4
CWE-384 CWE-639 CWE-862
Published
Advisory Summary

CVE-2026-61592 is a HIGH (CVSS 7.4) sse sessions are not bound vulnerability (CWE-384: Session Fixation) affecting djust libraries in the PyPI ecosystem. The issue involves sse sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack). Remediation is available by upgrading affected packages to version 1.0.7.

CVE-2026-61592 at a Glance

CVE Identifier CVE-2026-61592
GHSA Identifier GHSA-f795-p5jw-j6g2
Severity HIGH
CVSS v3.1 Base Score 7.4
CWE Classification CWE-384: Session Fixation
Affected Product djust
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-61592

To remediate this vulnerability, upgrade all affected djust dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

djust fixed: 1.0.7 
pip install djust>=1.0.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show djust

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-61592, inspect your installed packages using pip:

pip show djust

Analyze the terminal output to locate any version of djust in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.7), your application is affected.

Note: The pip show djust command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-384: Session Fixation, where authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. In djust, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact 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**. ### Patches 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. ### Workarounds Disable the SSE transport short of upgrading.

CVE-2026-61592 Affected djust Versions

1 component(s)
Fixed Versions:
1.0.7
Product / Package Ecosystem Affected Versions Fixed Version
djust
pypi/djust
PyPI
< 1.0.7
1.0.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/djust-org/djust/security/advisories/GHSA-f795-p5jw-j6g2
djust Source Repository REPOSITORY
https://github.com/djust-org/djust
djust Release RELEASE
https://github.com/djust-org/djust/releases/tag/v1.0.7

Frequently Asked Questions

What is CVE-2026-61592?
CVE-2026-61592 is a security vulnerability in djust involving SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack) under CWE-384: Session Fixation.
Which djust versions are affected?
Affected versions include releases prior to 1.0.7 across affected packages: djust.
What version fixes CVE-2026-61592?
Upgrading to 1.0.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is djust affected?
Yes, djust is affected in releases prior to 1.0.7. Upgrade your dependency to 1.0.7 or later.
What is the CVSS score of CVE-2026-61592?
CVE-2026-61592 has a CVSS v3.1 base score of 7.4 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-61592?
CVE-2026-61592 is classified under CWE-384: Session Fixation (Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.).
How can I check PyPI dependencies for CVE-2026-61592?
Run the dependency tree command: 'pip show djust'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f795-p5jw-j6g2",
  "modified" : "2026-09-16T21:53:43Z",
  "published" : "2026-09-16T21:53:43Z",
  "aliases" : [ "CVE-2026-61592" ],
  "summary" : "djust: SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack)",
  "details" : "### Impact\nSSE 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**.\n\n### Patches\nFixed 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.\n\n### Workarounds\nDisable the SSE transport short of upgrading.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "djust"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/djust-org/djust/security/advisories/GHSA-f795-p5jw-j6g2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/djust-org/djust"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/djust-org/djust/releases/tag/v1.0.7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-384", "CWE-639", "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-16T21:53:43Z",
    "nvd_published_at" : null
  }
}