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CVE-2026-63198

traQ is a messenger application built for Digital Creators Club traP. Prior to 3.28.3, OAuth2 silent…

CVSS 3.1 · [email protected] · Secondary 7.3 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 13 Nov 2026 22:01:12 UTC. Read the latest advisory.

nvd · CVE-2026-63198

Published

traQ is a messenger application built for Digital Creators Club traP. Prior to 3.28.3, OAuth2 silent authorization requests using prompt=none with an empty or omitted scope parameter check prior consent against the empty requested scope set even though all scopes registered for the client become eligible for issuance. An attacker who controls an OAuth client capable of receiving authorization codes can target a user who previously consented to only some client scopes and obtain an access token containing broader registered scopes without additional consent. A user who has never consented to the client still receives consent_required. This issue is fixed in version 3.28.3.

Read the publisher's advisory

Affected versions, risk and source history

nvd · CVE-2026-63198

Published

traQ is a messenger application built for Digital Creators Club traP. Prior to 3.28.3, OAuth2 silent authorization requests using prompt=none with an empty or omitted scope parameter check prior consent against the empty requested scope set…

traQ is a messenger application built for Digital Creators Club traP. Prior to 3.28.3, OAuth2 silent authorization requests using prompt=none with an empty or omitted scope parameter check prior consent against the empty requested scope set even though all scopes registered for the client become eligible for issuance. An attacker who controls an OAuth client capable of receiving authorization codes can target a user who previously consented to only some client scopes and obtain an access token containing broader registered scopes without additional consent. A user who has never consented to the client still receives consent_required. This issue is fixed in version 3.28.3.

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-863

Original publisher date fields

published: 2026-11-03T19:18:09.080

lastModified: 2026-11-12T22:18:51.470

Source published
3 Nov 2026 19:18:09 UTC
Source modified
12 Nov 2026 22:18:51 UTC
Saved here
13 Nov 2026 22:01:12 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 7.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

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Sources read 15 Nov 15:52 UTC · 256 of 275 readable · 251 fully read · documentation 469/469 current

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