GHSA-j5rm-v3vh-vx94
eduMFA Passkeys: missing expiration flag may allow replay attacks and reuse of old challenges
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
What each source reports
GitHub Advisories Score used
eduMFA Passkeys: missing expiration flag may allow replay attacks and reuse of old challenges
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.
- Record
GHSA-j5rm-v3vh-vx94- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-287, CWE-613
- Updated
- 2026-11-02
OSV
eduMFA Passkeys: missing expiration flag may allow replay attacks and reuse of old challenges
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.
- Record
GHSA-j5rm-v3vh-vx94- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-287, CWE-613
- Updated
- 2026-11-02
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-j5rm-v3vh-vx94 is a high vulnerability (CVSS 8.7) in edumfa, published May 18, 2026. No source lists public exploit code. Fixed in edumfa 2.9.1.