Low
Discourse doesn't prevent moderators from exporting user Chat DMs
Type: advisorySources: OSV
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. 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-2026-27153
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 16:26 UTC · Revision 1
Source evidence
Discourse doesn't prevent moderators from exporting user Chat DMs
core-osv · Original sourcePublished 26 Feb 2026, 21:16 UTC
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
osv:CVE-2026-27153
Complete source record
{
"id": "0b74439eca08c6f7cce5d4e1657cda66a618eb347f324fb4bf26644562b0d0b4",
"url": "https://osv.dev/vulnerability/CVE-2026-27153",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Discourse doesn't prevent moderators from exporting user Chat DMs",
"summary": "Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.",
"evidence": "osv:CVE-2026-27153",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2026-27153",
"aliases": [
"BIT-discourse-2026-27153",
"CVE-2026-27153",
"GHSA-5cp2-jq8m-33mf"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "9c924c6f4f3885ab616e21bec2447af7056b4322"
},
{
"introduced": "322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"
},
{
"fixed": "8a2a8b7d3a494435949a12ad078b22509f54bd58"
},
{
"introduced": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
},
{
"last_affected": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2025.12.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2026.1.0"
},
{
"fixed": "2026.1.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2026.2.0:*:*:*:latest:*:*:*",
"range": [
{
"introduced": "2026.2.0"
},
{
"last_affected": "2026.2.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2026.2.0",
"v2025.12.1",
"v2026.1.0",
"stable",
"esr",
"v2026.2.0-latest",
"release",
"latest-release",
"beta",
"v2025.12.0",
"v2026.1.0-latest",
"v2025.12.0-latest",
"v3.6.0.beta2",
"v3.6.0.beta1",
"v3.5.0.beta9",
"v3.5.0.beta8",
"v3.5.0.beta7",
"v3.5.0.beta6",
"v3.5.0.beta5",
"v3.5.0.beta4",
"v3.5.0.beta3",
"v3.5.0.beta2",
"v3.5.0.beta1",
"v3.4.0.beta4",
"v3.4.0.beta3",
"v3.4.0.beta2",
"v3.4.0.beta1",
"v3.3.0.beta5",
"v3.3.0.beta6",
"v3.3.0.beta4",
"v3.3.0.beta3",
"v3.3.0.beta2",
"v3.3.0.beta1",
"v3.2.0.beta5",
"v3.2.0.beta4",
"v3.2.0.beta3",
"v3.2.0.beta2",
"v3.2.0.beta1",
"v3.1.0.beta8",
"v3.1.0.beta7",
"v3.1.0.beta6",
"v3.1.0.beta5",
"v3.1.0.beta4",
"v3.1.0.beta3",
"v3.1.0.beta2",
"v3.1.0.beta1",
"v3.0.0.beta16",
"v3.0.0.beta15",
"v2.9.0.beta14",
"v2.9.0.beta13",
"v2.9.0.beta12",
"v2.9.0.beta11",
"v2.9.0.beta10",
"v2.9.0.beta9",
"v2.9.0.beta8",
"v2.9.0.beta7",
"v2.9.0.beta6",
"v2.9.0.beta5",
"v2.9.0.beta4",
"v2.9.0.beta3",
"v2.9.0.beta2",
"v2.9.0.beta1",
"v2.8.0.beta11",
"v2.8.0.beta10",
"v2.8.0.beta9",
"v2.8.0.beta8",
"v2.8.0.beta7",
"v2.8.0.beta6",
"v2.8.0.beta5",
"v2.8.0.beta4",
"v2.8.0.beta3",
"v2.8.0.beta2",
"v2.8.0.beta1",
"v2.7.0.beta9",
"v2.7.0.beta8",
"v2.7.0.beta7",
"v2.7.0.beta6",
"v2.7.0.beta5",
"v2.7.0.beta4",
"v2.7.0.beta3",
"v2.7.0.beta2",
"v2.7.0.beta1",
"v2.6.0.beta6",
"v2.6.0.beta5",
"v2.6.0.beta4",
"v2.6.0.beta3",
"v2.6.0.beta2",
"v2.6.0.beta1",
"v2.5.0.beta7",
"v2.5.0.beta6",
"v2.5.0.beta5",
"v2.5.0.beta4",
"v2.5.0.beta3",
"v2.5.0.beta2",
"v2.5.0.beta1",
"v2.4.0.beta11",
"v2.4.0.beta10",
"v2.4.0.beta9",
"v2.4.0.beta8",
"v2.4.0.beta7",
"v2.4.0.beta6",
"v2.4.0.beta5",
"v2.4.0.beta4",
"v2.4.0.beta3",
"v2.4.0.beta2",
"v2.4.0.beta1",
"v2.3.0.beta11",
"v2.3.0.beta10",
"v2.3.0.beta9",
"v2.3.0.beta8",
"v2.3.0.beta7",
"v2.3.0.beta6",
"v2.3.0.beta5",
"v2.3.0.beta4",
"v2.3.0.beta3",
"v2.3.0.beta2",
"v2.3.0.beta1",
"v2.2.0.beta10",
"v2.2.0.beta9",
"v2.2.0.beta8",
"v2.2.0.beta7",
"v2.2.0.beta6",
"v2.2.0.beta5",
"v2.2.0.beta4",
"v2.2.0.beta3",
"v2.2.0.beta2",
"v2.2.0.beta1",
"v2.1.0.beta6",
"v2.1.0.beta5",
"v2.1.0.beta4",
"v2.1.0.beta3",
"v2.1.0.beta2",
"v2.1.0.beta1",
"v2.0.0.beta10",
"v2.0.0.beta9",
"v2.0.0.beta8",
"v2.0.0.beta7",
"v2.0.0.beta6",
"v2.0.0.beta5",
"v2.0.0.beta4",
"v2.0.0.beta3",
"v2.0.0.beta2",
"v2.0.0.beta1",
"v1.9.0.beta17",
"v1.9.0.beta16",
"v1.9.0.beta15",
"v1.9.0.beta14",
"v1.9.0.beta13",
"v1.9.0.beta12",
"v1.9.0.beta11",
"v1.9.0.beta10",
"v1.9.0.beta9",
"v1.9.0.beta8",
"v1.9.0.beta7",
"v1.9.0.beta6",
"v1.9.0.beta5",
"v1.9.0.beta4",
"v1.9.0.beta3",
"v1.9.0.beta2",
"v1.9.0.beta1",
"v1.8.0.beta13",
"v1.8.0.beta12",
"v1.8.0.beta11",
"v1.8.0.beta10",
"v1.8.0.beta9",
"v1.8.0.beta8",
"v1.8.0.beta7",
"v1.8.0.beta6",
"v1.8.0.beta5",
"v1.8.0.beta4",
"v1.8.0.beta3",
"v1.8.0.beta2",
"v1.8.0.beta1",
"v1.7.0.beta11",
"v1.7.0.beta10",
"v1.7.0.beta9",
"v1.7.0.beta8",
"v1.7.0.beta7",
"v1.7.0.beta6",
"v1.7.0.beta5",
"v1.7.0.beta4",
"v1.7.0.beta3",
"v1.7.0.beta1",
"v1.7.0.beta2",
"v1.6.0.beta12",
"v1.6.0.beta11",
"v1.6.0.beta10",
"v1.6.0.beta9",
"v1.6.0.beta8",
"v1.6.0.beta7",
"v1.6.0.beta6",
"v1.6.0.beta5",
"v1.6.0.beta4",
"v1.6.0.beta3",
"v1.6.0.beta2",
"v1.6.0.beta1",
"v1.5.0.beta14",
"v1.5.0.beta13b",
"v1.5.0.beta13",
"v1.5.0.beta12",
"v1.5.0.beta11",
"v1.5.0.beta10",
"v1.5.0.beta9",
"v1.5.0.beta8",
"v1.5.0.beta7",
"v1.5.0.beta6",
"v1.5.0.beta5",
"v1.5.0.beta4",
"v1.5.0.beta2",
"v1.5.0.beta1",
"v1.4.0.beta12",
"v1.4.0.beta11",
"v1.4.0.beta10",
"v1.4.0.beta9",
"v1.4.0.beta8",
"v1.4.0.beta7",
"v1.4.0.beta6",
"v1.4.0.beta5",
"v1.4.0.beta4",
"v1.4.0.beta3",
"v1.4.0.beta2",
"v1.4.0.beta1",
"v1.3.0.beta11",
"v1.3.0.beta10",
"v1.3.0.beta9",
"v1.3.0.beta6",
"v1.3.0.beta5",
"v1.3.0.beta4",
"v1.3.0.beta3",
"v1.3.0.beta2",
"v1.3.0.beta1",
"v1.2.0.beta9",
"v1.2.0.beta8",
"v1.2.0.beta7",
"v1.2.0.beta6",
"v1.2.0.beta5",
"v1.2.0.beta4",
"v1.2.0.beta3",
"v1.2.0.beta2",
"v1.2.0.beta1",
"v1.1.0.beta8",
"v1.1.0.beta7",
"v1.1.0.beta6b",
"v1.1.0.beta6",
"v1.1.0.beta5",
"v1.1.0.beta4",
"v1.1.0.beta3",
"v1.1.0.beta2",
"v1.0.0",
"v0.9.9.18",
"v0.9.9.17",
"v0.9.9.16",
"v0.9.9.15",
"v0.9.9.14",
"v0.9.9.13",
"v0.9.9.12",
"v0.9.9.11",
"v0.9.9.10",
"v0.9.9.9",
"v0.9.9.8",
"v0.9.9.7",
"v0.9.9.6",
"v0.9.9.5",
"v0.9.9.4",
"v0.9.9.3",
"v0.9.9.2",
"v0.9.9.1",
"v0.9.8.11",
"v0.9.8.10",
"v0.9.8.9",
"v0.9.8.8",
"v0.9.8.7",
"v0.9.8.6",
"v0.9.8.5",
"v0.9.8.4",
"v0.9.8.3",
"v0.9.8.2",
"v0.9.8.1",
"v0.9.8",
"v0.9.7.9",
"v0.9.7.8",
"v0.9.7.7",
"v0.9.7.6",
"v0.9.7.5",
"v0.9.7.4",
"v0.9.7.3",
"v0.9.7.2",
"v0.9.7.1",
"v0.9.7",
"v0.9.6.4",
"v0.9.6.3",
"v0.9.6.1",
"v0.9.6",
"v0.9.5.2",
"v0.9.5.1",
"v0.9.5",
"v0.9.4",
"v0.9.3",
"v0.9.2.6",
"v0.9.2.5",
"v0.9.2",
"v0.9.1",
"v0.9.0",
"v0.8.9",
"v0.8.8",
"v0.8.7",
"v0.8.6",
"v0.8.5",
"v0.8.4",
"v0.8.3",
"v0.8.2",
"v0.8.1",
"v0.8.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27153.json"
}
}
],
"modified": "2026-10-28T02:30:21.060530108Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27153.json",
"https://github.com/discourse/discourse/security/advisories/GHSA-5cp2-jq8m-33mf",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27153"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27153.json"
}
},
"related_cves": [
{
"value": "CVE-2026-27153",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 487107,
"published_at": "2026-02-26T21:16:41.077+00:00"
}