CVE-2026-40869Disclosure(decidim / decidim)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Decidim is a participatory democracy framework. Starting in version 0.19.0 and prior to versions 0.30.5 and 0.31.1, a vulnerability allows any registered and authenticated user to accept or reject any amendments. The impact is on any users who have created proposals where the amendments feature is enabled. This also elevates the user accepting the amendment as the author of the original proposal as people amending proposals are provided coauthorship on the coauthorable resources. Versions 0.30.5 and 0.31.1 fix the issue. As a workaround, disable amendment reactions for the amendable component (e.g. proposals).

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-266

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • decidim

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
Products
decidim

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-21: 1Technical Details · 2026-04-21: 104-21
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-40869 Unauthorized Amendment Acceptance in Decidim Prior to Versions 0.30.5 and 0.31.1 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-40869

    Post summary

    The message discloses CVE-2026-40869, noting it allows unauthorized amendment acceptance on Decidim versions prior to 0.30.5 and 0.31.1, without providing proof‑of‑concept, exploit code, or patch information.

    0000039
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appdecidimdecidim-ruby-

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