CVE-2026-65645 (GCVE-0-2026-65645)
Vulnerability from cvelistv5 – Published: 2026-08-21 02:53 – Updated: 2026-08-21 02:53
VLAI
EPSS
VEX
Summary
Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {"$gt": "4"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user.
The REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:'string'} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable
Severity
No CVSS data available.
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Rocket.Chat | Rocket.Chat |
Affected:
0 , < 8.8.0
(semver)
Affected: 0 , < 8.7.1 (semver) Affected: 0 , < 8.6.2 (semver) Affected: 0 , < 8.5.3 (semver) Affected: 0 , < 8.4.6 (semver) Affected: 0 , < 8.3.8 (semver) Affected: 0 , < 8.2.8 (semver) Affected: 0 , < 8.1.8 (semver) Affected: 0 , < 7.10.15 (semver) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Rocket.Chat",
"vendor": "Rocket.Chat",
"versions": [
{
"lessThan": "8.8.0",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.7.1",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.6.2",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.5.3",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.4.6",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.3.8",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.2.8",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "8.1.8",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "7.10.15",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Aang (iamaangx028)"
}
],
"descriptions": [
{
"lang": "en",
"value": "Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {\"$gt\": \"4\"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user.\nThe REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:\u0027string\u0027} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T02:53:43.305Z",
"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"shortName": "hackerone"
},
"references": [
{
"url": "https://hackerone.com/reports/3852135"
},
{
"url": "https://github.com/RocketChat/Rocket.Chat/pull/41814"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"assignerShortName": "hackerone",
"cveId": "CVE-2026-65645",
"datePublished": "2026-08-21T02:53:43.305Z",
"dateReserved": "2026-07-22T15:00:06.104Z",
"dateUpdated": "2026-08-21T02:53:43.305Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-65645",
"date": "2026-08-21",
"epss": "0.00145",
"percentile": "0.043"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-65645\",\"sourceIdentifier\":\"support@hackerone.com\",\"published\":\"2026-08-21T04:18:14.690\",\"lastModified\":\"2026-08-21T04:18:14.690\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {\\\"$gt\\\": \\\"4\\\"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user.\\nThe REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:\u0027string\u0027} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable\"}],\"affected\":[{\"source\":\"support@hackerone.com\",\"affectedData\":[{\"vendor\":\"Rocket.Chat\",\"product\":\"Rocket.Chat\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"8.8.0\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.7.1\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.6.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.5.3\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.4.6\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.3.8\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.2.8\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"8.1.8\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.10.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://github.com/RocketChat/Rocket.Chat/pull/41814\",\"source\":\"support@hackerone.com\"},{\"url\":\"https://hackerone.com/reports/3852135\",\"source\":\"support@hackerone.com\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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