CVE-2026-45377Public exploitNetwork attack vectorHinoki check available

Private export disclosure via reusable bearer links

Published Jul 31, 2026 · Updated Jul 31, 2026

Information disclosure in Decidim before 0.30.9, 0.31.0.rc1 through 0.31.4, and 0.32.0.rc1 allows attackers to read private exports. Decidim::DownloadYourDataController#download_file verifies the export owner, then redirects to a signed Active Storage blob URL that is not bound to that session. The owner must start the authenticated download and the bearer URL must leak through the redirect chain; replay needs no Decidim session and exposes only that export.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in Decidim before 0.30.9, 0.31.0.rc1 through 0.31.4, and 0.32.0.rc1 allows attackers to read private exports. Decidim::DownloadYourDataController#download_file verifies the export owner, then redirects to a signed Active Storage blob URL that is not bound to that session. The owner must start the authenticated download and the bearer URL must leak through the redirect chain; replay needs no Decidim session and exposes only that export.

The record

CVE
CVE-2026-45377
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Decidim
Product
Decidim
Classifications
CWE-200, CWE-284, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 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=< 0.30.9
  2. Affected versionversion=>= 0.31.0.rc1, < 0.31.5
  3. Affected versionversion=>= 0.32.0.rc1, < 0.32.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Decidim · Decidimversion=< 0.30.9; version=>= 0.31.0.rc1, < 0.31.5; version=>= 0.32.0.rc1, < 0.32.0

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-284Improper Access Control
T1213Data from Information Repositories

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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