Detections
Analytics
SCA: security update for Duende.AccessTokenManagement (GHSA-qxj7-2x7w-3mpp)
medium Tenable Cloud Security Plugin ID 420918
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Duende.AccessTokenManagement is a set of .NET libraries that manage OAuth and OpenId Connect access
tokens. Duende.AccessTokenManagement contains a race condition when requesting access tokens using the
client credentials flow. Concurrent requests to obtain an access token using differing protocol parameters
can return access tokens obtained with the wrong scope, resource indicator, or other protocol parameters.
Such usage is somewhat atypical, and only a small percentage of users are likely to be affected.
Duende.AccessTokenManagement can request access tokens using the client credentials flow in several ways.
In basic usage, the client credentials flow is configured once and the parameters do not vary. In more
advanced situations, requests with varying protocol parameters may be made by calling specific overloads
of these methods: `HttpContext.GetClientAccessTokenAsync()` and
`IClientCredentialsTokenManagementService.GetAccessTokenAsync()`. There are overloads of both of these
methods that accept a `TokenRequestParameters` object that customizes token request parameters. However,
concurrent requests with varying `TokenRequestParameters` will result in the same token for all concurrent
calls. Most users can simply update the NuGet package to the latest version. Customizations of the
`IClientCredentialsTokenCache` that derive from the default implementation
(`DistributedClientCredentialsTokenCache`) will require a small code change, as its constructor was
changed to add a dependency on the `ITokenRequestSynchronization` service. The synchronization service
will need to be injected into the derived class and passed to the base constructor. The impact of this
vulnerability depends on how Duende.AccessTokenManagement is used and on the security architecture of the
solution. Most users will not be vulnerable to this issue. More advanced users may run into this issue by
calling the methods specified above with customized token request parameters. The impact of obtaining an
access token with different than intended protocol parameters will vary depending on application logic,
security architecture, and the authorization policy of the resource servers. (CVE-2025-26620)
See Also
Plugin Details
Severity: Medium
ID: 420918
Version: Revision 1.21
Type: Local
Family: SCA Checks
Published: 2/19/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 57.82
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2025-26620
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 2/19/2025
Vulnerability Publication Date: 2/18/2025
Reference Information
CVE: CVE-2025-26620
cwe: CWE-367