CVE-2026-45377 decidim CVE debrief

Who should care

Decidim users and administrators should be aware of this vulnerability and take necessary actions to prevent unauthorized data access. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed to ensure proper mitigation. This includes verifying installations and applying updates to prevent unauthorized data access.

Technical summary

The Decidim framework has a vulnerability allowing replay of download_your_data flow without authentication, affecting versions prior to 0.30.9, 0.31.5, and 0.32.0.rc2. The vulnerability allows an attacker to access sensitive data without proper authentication. The issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed to ensure proper mitigation.

Defensive priority

Decidim users should verify their installations and apply updates to prevent unauthorized data access.

Recommended defensive actions

• Apply Decidim updates to version 0.30.9, 0.31.5, or 0.32.0.rc2
• Verify Decidim installation and configuration
• Monitor for suspicious data access attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The Decidim framework has a vulnerability allowing replay of download_your_data flow without authentication. Evidence is based on official CVE and NVD records. The vulnerability affects versions prior to 0.30.9, 0.31.5, and 0.32.0.rc2. Decidim users should verify their installations and apply updates to prevent unauthorized data access. The issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.