CVE-2026-65645 (GCVE-0-2026-65645)

Vulnerability from cvelistv5 – Published: 2026-08-21 02:53 – Updated: 2026-08-27 17:46
VLAI
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 17:46 UTC
CWE
  • CWE-20 - Improper Input Validation
Impacted products
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 Create a notification for this product.
Show details on NVD website

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              "confidentialityImpact": "LOW",
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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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