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CVE-2026-40870

Decidim is a participatory democracy framework. Starting in version 0.0.1 and prior to versions 0.30.5 and 0.31.1, the root level `commentable` field in the API allows access to all commentable resources within the platform, without any permission checks. All Decidim instances are impacted that have not secured the `/api` endpoint. The `/api` endpoint is publicly available with the default configuration. Versions 0.30.5 and 0.31.1 fix the issue. As a workaround, limit the scope to only authentic
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:341840fe97172dba638b5aa18f72c4233d5f44839f284fdc58c4b23d8b9492e9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"decidim","vendor":"decidim","versions":[{"status":"affected","version":"> 0.31.0.rc1, < 0.31.1"},{"status":"affected","version":">= 0.0.1, < 0.30.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a084756e7769e9fda8faa75ca8c42b78144b6f1a229f14e21894d2653758653d · sha256:d636b2a494810d3f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a084756e7769e9fda8faa75ca8c42b78144b6f1a229f14e21894d2653758653d · sha256:d636b2a494810d3f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a084756e7769e9fda8faa75ca8c42b78144b6f1a229f14e21894d2653758653d · sha256:d636b2a494810d3f… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/decidim/decidim/security/advisories/GHSA-ghmh-q25g-gxxx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/decidim/decidim/security/advisories/GHSA-ghmh-q25g-gxxx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a084756e7769e9fda8faa75ca8c42b78144b6f1a229f14e21894d2653758653d · sha256:d636b2a494810d3f… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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