Medium
Discourse: Poll voters endpoint lacked post visibility checks
Type: advisorySources: OSV
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-27021
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 14:56 UTC · Revision 1
Source evidence
Discourse: Poll voters endpoint lacked post visibility checks
core-osv · Original sourcePublished 26 Feb 2026, 19:50 UTC
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
osv:CVE-2026-27021
Complete source record
{
"id": "f1a29b1bd9dafebd155e7f194a441d5d9858c06cabf24ffc5d5fcf632668cd99",
"url": "https://osv.dev/vulnerability/CVE-2026-27021",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Discourse: Poll voters endpoint lacked post visibility checks",
"summary": "Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.",
"evidence": "osv:CVE-2026-27021",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-27021",
"aliases": [
"BIT-discourse-2026-27021",
"CVE-2026-27021",
"GHSA-f5m5-9hpw-7c2g"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
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"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
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"introduced": "0"
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{
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"database_specific": {
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"range": [
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"source": "CPE_RANGE"
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],
"modified": "2026-10-28T02:30:29.852645255Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27021.json",
"https://github.com/discourse/discourse/security/advisories/GHSA-f5m5-9hpw-7c2g",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27021"
],
"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27021.json"
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{
"value": "CVE-2026-27021",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 496582,
"published_at": "2026-02-26T19:50:56.341+00:00"
}