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CVE-2026-100675— stoatchat before 0.15.5 Denial of Service via mass mentions

Quick assessment

Affected
stoatchat stoatchat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Stoatchat 0.15.5 之前版本存在一个拒绝服务（DoS）漏洞，该漏洞位于处理大规模提及消息的确认工作器（acknowledgement worker）中。经过身份验证的用户可以发送五条精心构造的角色提及消息，导致所有确认工作器终止，从而在全局范围内禁用推送通知和提及徽章功能，直到 API 进程重启。

CVSS 6.5 · Medium EPSS 0.31% · P21

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-100675

Vulnerability Information
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Vulnerability Title
stoatchat before 0.15.5 Denial of Service via mass mentions
Source: CVE Program / CVE List V5
Vulnerability Description
stoatchat versions before 0.15.5 contain a denial of service vulnerability in the acknowledgement worker that processes mass mention messages. Authenticated users can send five crafted role-mention messages to terminate all acknowledgement workers, disabling push notifications and mention badges deployment-wide until the API process restarts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
stoatchat stoatchat 0 ~ 0.15.5 -

II. Public POCs for CVE-2026-100675

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III. Intelligence Information for CVE-2026-100675

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Vendor Advisories for CVE-2026-100675 (1)

Other References for CVE-2026-100675 (1)

Same Patch Batch · stoatchat · 2026-09-26 · 6 CVEs total

CVE-2026-100679 8.8 HIGH stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket
CVE-2026-100676 8.2 HIGH stoatchat before 0.15.5 Local Filesystem Read via SVG
CVE-2026-100678 6.5 MEDIUM stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting
CVE-2026-100677 5.3 MEDIUM stoatchat before 0.15.5 Account Enumeration via Error Location
CVE-2026-100674 4.3 MEDIUM stoatchat before 0.15.5 Username Validation Bypass via Unicode Sanitization

IV. Related Vulnerabilities

Same product: stoatchat
Same vendor: stoatchat
Same weakness: CWE-248

V. Comments for CVE-2026-100675

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