GHSA-j5rm-v3vh-vx94: eduMFA Passkeys Missing Expiration Flag May Allow Vulnerability

HIGH
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CWE-613 CWE-287
Published
Advisory Summary

GHSA-j5rm-v3vh-vx94 is a HIGH missing expiration flag may allow vulnerability (CWE-613: Insufficient Session Expiration) affecting eduMFA Passkeys libraries in the PyPI ecosystem. The issue involves missing expiration flag may allow replay attacks and reuse of old challenges. Remediation is available by upgrading affected packages to version 2.9.1.

GHSA-j5rm-v3vh-vx94 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-j5rm-v3vh-vx94
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-613: Insufficient Session Expiration
Affected Product eduMFA Passkeys
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-j5rm-v3vh-vx94

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

edumfa fixed: 2.9.1 
pip install edumfa>=2.9.1
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 edumfa

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-j5rm-v3vh-vx94, inspect your installed packages using pip:

pip show edumfa

Analyze the terminal output to locate any version of eduMFA Passkeys in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.9.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-613: Insufficient Session Expiration, where according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". In eduMFA Passkeys, 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 In eduMFA < 2.9.1 userless Passkey/WebAuthn challenges might be replayed and do not expire ### Patches Fixed in eduMFA >= 2.9.1 by adding validity information to the userless challenges. ### Workarounds No known workarounds besides disabling userless login altogether.

GHSA-j5rm-v3vh-vx94 Affected eduMFA Passkeys Versions

1 component(s)
Fixed Versions:
2.9.1
Product / Package Ecosystem Affected Versions Fixed Version
edumfa
pypi/edumfa
PyPI
< 2.9.1
2.9.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/eduMFA/eduMFA/security/advisories/GHSA-j5rm-v3vh-vx94
eduMFA Passkeys Source Repository REPOSITORY
https://github.com/eduMFA/eduMFA

Frequently Asked Questions

What is GHSA-j5rm-v3vh-vx94?
GHSA-j5rm-v3vh-vx94 is a security vulnerability in eduMFA Passkeys involving missing expiration flag may allow replay attacks and reuse of old challenges under CWE-613: Insufficient Session Expiration.
Which eduMFA Passkeys versions are affected?
Affected versions include releases prior to 2.9.1 across affected packages: edumfa.
What version fixes GHSA-j5rm-v3vh-vx94?
Upgrading to 2.9.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is edumfa affected?
Yes, edumfa is affected in releases prior to 2.9.1. Upgrade your dependency to 2.9.1 or later.
What CWE is associated with GHSA-j5rm-v3vh-vx94?
GHSA-j5rm-v3vh-vx94 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").
How can I check PyPI dependencies for GHSA-j5rm-v3vh-vx94?
Run the dependency tree command: 'pip show edumfa'. 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-j5rm-v3vh-vx94",
  "modified" : "2026-05-18T15:37:00Z",
  "published" : "2026-05-18T15:37:00Z",
  "aliases" : [ ],
  "summary" : "eduMFA Passkeys: missing expiration flag may allow replay attacks and reuse of old challenges ",
  "details" : "### Impact\nIn eduMFA < 2.9.1 userless Passkey/WebAuthn challenges might be replayed and do not expire\n\n### Patches\nFixed in eduMFA >= 2.9.1 by adding validity information to the userless challenges.\n\n### Workarounds\nNo known workarounds besides disabling userless login altogether.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "edumfa"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.9.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/eduMFA/eduMFA/security/advisories/GHSA-j5rm-v3vh-vx94"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/eduMFA/eduMFA"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287", "CWE-613" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-18T15:37:00Z",
    "nvd_published_at" : null
  }
}