CVE-2026-63198

traQ: Privilege escalation by OAuth prompt=none request

CVSS score

7.3

EPSS probability

—

Risk score

0.7

Published

2 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

traQ Privilege Escalation via OAuth prompt=none Request

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

traQ versions contain a privilege escalation vulnerability where OAuth2 silent authorization requests using prompt=none allow obtaining broader access tokens without additional user consent.

Why does it matter?

This vulnerability allows attackers to acquire broader client scopes that users have never explicitly consented to, compromising confidentiality and data integrity.

What should be done?

Update to version 3.28.3 or later
Follow vendor advisories

Chain of evidence and sources2 verified claims

traQ 3.28.3 öncesi sürümlerde OAuth2 sessiz yetkilendirme istekleri prompt=none parametresiyle yetki yükseltmeye açıktır.

S0 · daybreach-canonical S1 · cvelist

Saldırgan, daha önce sınırlı kapsamda onay vermiş bir kullanıcıyı hedefleyerek ek onay almadan daha geniş kapsamlı bir erişim belirteci elde edebilir.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CWE: CWE-863

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-63198 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	traPtitech	traQ	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.3	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N	NVD
7.3	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-63198 is associated with the following CWEs:

CWE-863: Common Weakness Enumeration Entry CWE-863

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-63198 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekiyor

Official Sources and Advisories

https://github.com/traPtitech/traQ/security/advisories/GHSA-8cfq-jgf7-8m27vendor-advisory https://github.com/traPtitech/traQ/commit/5510fe8aa9bb15fc4755c78792381dbb03d576c3vendor-advisory https://github.com/traPtitech/traQ/releases/tag/v3.28.3vendor-advisory

CVSS Vector Radar Chart

7.3 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User Interaction—

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)High

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

traPtitech

Weakness Type (CWE & CAPEC)

CWE-863

Similar Vulnerabilities

7.3

CVE-2026-63197traQ: XSS in the User Uploaded File Retrieval API

VendortraPtitech ProducttraQ

Patch status unknown3 h ago

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