---
id: CVE-2026-111692
title: >-
  DataBuff ai-apm-web through 0.1.10 Authentication Bypass via Hardcoded HMAC
  Secret
summary: >-
  DataBuff ai-apm-web through 0.1.10 contains an authentication bypass
  vulnerability that allows unauthenticated attackers to forge admin session
  tokens by using the hardcoded HMAC secret in JwtTokenService. Attackers can
  sign a payload of…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-321
vendor: databufflabs
product: databuff
affected:
  - databuff <= 0.1.10
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-16T19:06:19.195700Z'
exploitAvailable: true
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:06:45.355Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111692'
references:
  - url: 'https://hackmd.io/@hieuPenguinnn/databuff-default-jwt-secret-auth-bypass'
  - url: >-
      https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/resources/application.yml#L54-L59
  - url: >-
      https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/config/JwtProperties.java#L8-L15
  - url: >-
      https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/auth/JwtTokenService.java#L36-L60
  - url: 'https://github.com/databufflabs/databuff'
  - url: >-
      https://www.vulncheck.com/advisories/databuff-ai-apm-web-through-0.1.10-authentication-bypass-via-hardcoded-hmac-secret
    label: >-
      VulnCheck Advisory: DataBuff ai-apm-web through 0.1.10 Authentication
      Bypass via Hardcoded HMAC Secret
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-16T18:43:08.655Z'
---

## Overview

DataBuff ai-apm-web through 0.1.10 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge admin session tokens by using the hardcoded HMAC secret in JwtTokenService. Attackers can sign a payload of admin and a future expiry with the default dev-secret to gain full administrative access to protected /webapi routes, including the Doris SQL query API.

## Affected

- `databuff <= 0.1.10`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.