CVE-2024-49755Network attack vector

Unauthorized local API access via unbound DPoP keys

Published Oct 28, 2024 · Updated Oct 29, 2024

Improper authentication in Duende IdentityServer 7.0.0 through 7.0.7 allows remote attackers to access local APIs with leaked DPoP tokens. ValidateHeaderAsync previously derived confirmation from the proof key without comparing its thumbprint to the access token's cnf.jkt value. Exploitation requires a leaked token and a custom Local API endpoint with DPoP explicitly enabled; the default bearer-token mode is unaffected.

CVSS severity3.1
Low
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Duende IdentityServer 7.0.0 through 7.0.7 allows remote attackers to access local APIs with leaked DPoP tokens. ValidateHeaderAsync previously derived confirmation from the proof key without comparing its thumbprint to the access token's cnf.jkt value. Exploitation requires a leaked token and a custom Local API endpoint with DPoP explicitly enabled; the default bearer-token mode is unaffected.

The record

CVE
CVE-2024-49755
Published
Oct 28, 2024
Updated
Oct 29, 2024
Vendor
Duende Software
Product
Duende IdentityServer
Classifications
CWE-287, T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 29, 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=>= 7.0.0, < 7.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Duende Software · Duende IdentityServerversion=>= 7.0.0, < 7.0.8

Published CVSS scores

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1550Use Alternate Authentication Material

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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