CVE-2026-82744Public exploitHinoki check available

Access-control bypass via raised change-step guard

Published Sep 1, 2026 · Updated Sep 1, 2026

Fail-open handling in Ash 3.0.0-rc.17 through 3.32.1 allows attackers to bypass gated changes via malformed action input. Ash.Reactor.ChangeStep's apply_validation/3 rescues a raised where-guard exception as a normal validation error, and apply_where_clauses/3 treats it as an unmet condition and skips the change. Reachability requires an application to pass attacker-controlled values to a guarded Reactor change; the skipped operation can preserve unauthorized privileges or omit tenant scoping or hashing.

CVSS severity2.1
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Fail-open handling in Ash 3.0.0-rc.17 through 3.32.1 allows attackers to bypass gated changes via malformed action input. Ash.Reactor.ChangeStep's apply_validation/3 rescues a raised where-guard exception as a normal validation error, and apply_where_clauses/3 treats it as an unmet condition and skips the change. Reachability requires an application to pass attacker-controlled values to a guarded Reactor change; the skipped operation can preserve unauthorized privileges or omit tenant scoping or hashing.

The record

CVE
CVE-2026-82744
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
Ash Framework
Product
Ash
Classifications
CWE-636, CAPEC-153, T1565.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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=3.0.0-rc.17 <3.32.2
  2. Affected versionversion=321f43bd05ad9544e693cbf797243693e51a6be4 <6d2eb86ea8d2ba5ffac89c1b8b9bf46e331feabc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Ash Framework · Ashversion=3.0.0-rc.17 <3.32.2; version=321f43bd05ad9544e693cbf797243693e51a6be4 <6d2eb86ea8d2ba5ffac89c1b8b9bf46e331feabc

Published CVSS scores

2.1Erlang Ecosystem FoundationCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-636Not Failing Securely ('Failing Open')
CAPEC-153Input Data Manipulation
T1565.001Stored Data Manipulation

Public exploit references

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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