CVE-2026-45414Public exploitNetwork attack vector

Authenticated cross-tenant access via host-unbound JWTs

Published Aug 6, 2026 · Updated Aug 6, 2026

Authorization bypass in Decidim before 0.31.5 and 0.32.0.rc1 allows remote authenticated users to access another tenant’s API. The API authentication strategies trust an API-user or organization-administrator JWT without binding its principal to the organization selected by the request host. A JWT issued through system-configured API credentials or an organization administrator account is required; participant JWTs do not expose the cross-tenant participantDetails data or proposal.answer path.

CVSS severity8.5
High
EPSS probability0.32%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Decidim before 0.31.5 and 0.32.0.rc1 allows remote authenticated users to access another tenant’s API. The API authentication strategies trust an API-user or organization-administrator JWT without binding its principal to the organization selected by the request host. A JWT issued through system-configured API credentials or an organization administrator account is required; participant JWTs do not expose the cross-tenant participantDetails data or proposal.answer path.

The record

CVE
CVE-2026-45414
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Decidim
Product
Decidim
Classifications
CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=< 0.31.5
  2. Affected versionversion=>= 0.32.0.rc1, < 0.32.0.rc2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Decidim · Decidimversion=< 0.31.5; version=>= 0.32.0.rc1, < 0.32.0.rc2

Published CVSS scores

8.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/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.

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

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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