Unrated
Discourse: TL4 users are able to change status of restricted topics
Type: advisorySources: OSV
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users are able to close, archive and pin topics in private categories they don't have access to. 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-2026-26979
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 20:41 UTC · Revision 1
Source evidence
Discourse: TL4 users are able to change status of restricted topics
core-osv · Original sourcePublished 26 Feb 2026, 19:25 UTC
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users are able to close, archive and pin topics in private categories they don't have access to. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
osv:CVE-2026-26979
Complete source record
{
"id": "416d7c942c304e61f7298f1f2148a2f2c0e4d0067c999326cd8338751ad9f813",
"url": "https://osv.dev/vulnerability/CVE-2026-26979",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Discourse: TL4 users are able to change status of restricted topics",
"summary": "Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users are able to close, archive and pin topics in private categories they don't have access to. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.",
"evidence": "osv:CVE-2026-26979",
"products": [],
"severity": "unknown",
"structured": {
"id": "CVE-2026-26979",
"aliases": [
"BIT-discourse-2026-26979",
"CVE-2026-26979",
"GHSA-9c7p-fqc5-c24f"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3e7317b3344cca6c6510a32cc4c5c0f540132ad9"
},
{
"introduced": "322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"
},
{
"fixed": "8a2a8b7d3a494435949a12ad078b22509f54bd58"
},
{
"introduced": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
},
{
"last_affected": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2025.12.0"
}
],
"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"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26979.json"
}
}
],
"modified": "2026-10-28T02:30:23.492241010Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26979.json",
"https://github.com/discourse/discourse/security/advisories/GHSA-9c7p-fqc5-c24f",
"https://nvd.nist.gov/vuln/detail/CVE-2026-26979"
],
"provider_metadata": {
"cwe_ids": [
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26979.json"
}
},
"related_cves": [
{
"value": "CVE-2026-26979",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 489979,
"published_at": "2026-02-26T19:25:15.812+00:00"
}