CVE-2024-51987Network attack vector

Cross-user API requests via pooled token cache

Published Nov 7, 2024 · Updated Nov 8, 2024

Privilege context error in Duende.AccessTokenManagement.OpenIdConnect 3.0.0 allows remote attackers to send API requests as another user. AuthenticationSessionUserAccessTokenStore keeps its authentication-result cache in a pooled HttpClient scope instead of a per-request scope, so a refreshed token survives into another user request. Exploitation requires a user in the system and a token refresh; attackers cannot choose whose token is reused or how long it persists.

CVSS severity5.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege context error in Duende.AccessTokenManagement.OpenIdConnect 3.0.0 allows remote attackers to send API requests as another user. AuthenticationSessionUserAccessTokenStore keeps its authentication-result cache in a pooled HttpClient scope instead of a per-request scope, so a refreshed token survives into another user request. Exploitation requires a user in the system and a token refresh; attackers cannot choose whose token is reused or how long it persists.

The record

CVE
CVE-2024-51987
Published
Nov 7, 2024
Updated
Nov 8, 2024
Vendor
Duende Software
Product
Duende.AccessTokenManagement
Classifications
CWE-270, T1550.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 3.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Duende Software · Duende.AccessTokenManagementversion== 3.0.0

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-270Privilege Context Switching Error
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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