CVE-2026-63197

traQ: XSS in the User Uploaded File Retrieval API

CVSS score

7.3

EPSS probability

—

Risk score

0.7

Published

3 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

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

XSS Vulnerability in traQ

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

Prior to version 3.28.3, traQ instances configured with local storage can return user-uploaded SVG or HTML content from the file retrieval endpoint for direct browser rendering, leading to XSS.

Why does it matter?

It allows an attacker with file-upload capability to execute arbitrary JavaScript in a victim's browser, posing risks to confidentiality and integrity.

What should be done?

Update traQ to version 3.28.3 or later
Follow the official vendor advisory

Chain of evidence and sources2 verified claims

traQ 3.28.3 öncesi sürümlerde yerel depolama yapılandırmaları dosya uç noktasından doğrudan tarayıcıda işlenebilen içerik döndürebilmektedir.

S0 · daybreach-canonical S1 · cvelist

Bu zafiyet, kurbanın tarayıcısında saldırgan kontrolündeki JavaScript kodunun çalıştırılmasına yol açabilir.

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, instances configured with TRAQ_STORAGE_TYPE=local can return user-uploaded SVG or HTML content from the /files/{fileId} retrieval endpoint for direct browser rendering. An attacker with file-upload capability can provide crafted active content and induce another user to open its file URL, causing attacker-controlled JavaScript to execute in the victim's browser. 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-79

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-2026-63197 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-2026-63197 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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-2026-63197 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-p74g-f95m-7fx7vendor-advisory https://github.com/traPtitech/traQ/commit/3db29e7771661f6418d88d186d8ff7817f5d6b6evendor-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-79

Similar Vulnerabilities

7.3

CVE-2026-63198traQ: Privilege escalation by OAuth prompt=none request

VendortraPtitech ProducttraQ

Patch status unknown3 h ago

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