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CVE-2026-23891

Decidim is a participatory democracy framework. In versions below 0.30.5 and 0.31.0.rc1 through 0.31.0, a stored code execution vulnerability in the user name field allows a low-privileged attacker to execute arbitrary code in the context of any user who passively visits a comment page, resulting in high confidentiality and integrity impact across security boundaries. This issue has been fixed in versions 0.30.5 and 0.31.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9575265fc11fcbea651e5536830c5c8ee24e3921635f4e3c3d9d4da24629e233
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":"< 0.30.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"LOW","subAvailabilityImpact":"LOW","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/decidim/decidim/releases/tag/v0.30.5","tags":["x_refsource_MISC"],"url":"https://github.com/decidim/decidim/releases/tag/v0.30.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /containers/cna/references/1
{"name":"https://github.com/decidim/decidim/releases/tag/v0.31.1","tags":["x_refsource_MISC"],"url":"https://github.com/decidim/decidim/releases/tag/v0.31.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /containers/cna/references/2
{"name":"https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0bc926a6c25c7511555e135fb2335a66463e6453f0733a36fa68341d42d28915 · sha256:af0116bb0039cc63… · /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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