CVE-2026-82753Network attack vector

Unauthenticated resource exhaustion via unbounded CIMD client creation

Published Sep 7, 2026 · Updated Sep 8, 2026

Resource exhaustion in Ash Project ash_authentication_oauth2_server 0.3.0 allows remote attackers to exhaust database storage and memory. At /authorize, resolve_client/3 fetches each URL-shaped client_id and stores uncapped, never-expiring client rows while caching documents before validation. Exploitation requires CIMD to be enabled and the unauthenticated endpoint to be exposed; resource depletion can interrupt the authorization service.

CVSS severity8.2
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Ash Project ash_authentication_oauth2_server 0.3.0 allows remote attackers to exhaust database storage and memory. At /authorize, resolve_client/3 fetches each URL-shaped client_id and stores uncapped, never-expiring client rows while caching documents before validation. Exploitation requires CIMD to be enabled and the unauthenticated endpoint to be exposed; resource depletion can interrupt the authorization service.

The record

CVE
CVE-2026-82753
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
Ash Project
Product
ash_authentication_oauth2_server
Classifications
CWE-770, CAPEC-130, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record 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=0.3.0 <0.3.1
  2. Affected versionversion=e713a9ba816761140c226e2ca55b75c0b93f5984 <45e24f69e0f95d67413e2508acc2264156acb5ac

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ash Project · ash_authentication_oauth2_serverversion=0.3.0 <0.3.1; version=e713a9ba816761140c226e2ca55b75c0b93f5984 <45e24f69e0f95d67413e2508acc2264156acb5ac

Published CVSS scores

8.2Erlang Ecosystem FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.003Application Exhaustion Flood

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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