---
id: "CVE-2026-111692"
kind: "vulnerability"
aliases: ["CVE-2026-111692"]
title: "DataBuff ai-apm-web through 0.1.10 contains an authentication bypass vulnerability that allows unauthenticated\u2026"
severity: "critical"
cvss: 9.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "databuff ai-apm-web", "fixed": [], "affected": "<= 0.1.10", "ecosystem": "github"}]
ecosystems: []
tags: ["ai-apm-web", "auth-bypass", "databuff", "docker", "doris", "hardcoded-secret", "other", "self-hosted"]
not_affected_if: ["custom-jwt-secret", "not-exposed-to-network", "not-internet-exposed", "version-above-0.1.10-with-changed-secret"]
published_at: "2026-10-16T18:17:52+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-23T23:28:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111692", "first_seen_at": "2026-10-23T21:57:13+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:28:55+00:00"}]
---

# DataBuff ai-apm-web through 0.1.10 contains an authentication bypass vulnerability that allows unauthenticated…

DataBuff ai-apm-web (<= 0.1.10) signs session tokens with a public default HMAC secret. The source-tree application.yml sets apm.security.jwt.secret: dev-secret, and the code falls back to change-me-in-production when the property is unset. The Docker image config does not set it. An unauthenticated attacker who can reach port 27403 can forge an 'admin|<future-epoch>' token and get full admin on /webapi routes, including POST /webapi/api/v1/ai/doris/query (read-only SQL), AI sessions, LLM provider config and alert/webhook config. The default admin login is also admin / Databuff@123. The researcher's writeup includes the exploit steps, but the author says they were not run against a live deployment. No exploitation in the wild is known.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- github:databuff ai-apm-web affected <= 0.1.10 fixed ?

## How to check

Check whether the web port (default 27403) is reachable from untrusted networks. Check whether apm.security.jwt.secret or the env var APM_SECURITY_JWT_SECRET is set to a non-default value in the ai-apm-web config (deploy/images/web/application.yml or docker-compose environment). If it is unset, you are exposed. Also test whether admin / Databuff@123 still logs in. Running image: docker ps | grep ai-apm-web, with tag <= 0.1.10.

## Fix

No patched release is known; v0.1.10 is the latest. Mitigate now: set a long random apm.security.jwt.secret (env APM_SECURITY_JWT_SECRET) and change apm.security.seed-password, restart ai-apm-web, and invalidate old sessions. Restrict port 27403 to a VPN or allowlist. If the secret was ever default and the port was exposed, review the Doris and LLM provider data and rotate LLM API keys. Watch databufflabs/databuff releases for a fix.

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111692
- 2026-10-23T23:28:55+00:00 analyst — No fix found: v0.1.10 (6 Oct) is the latest release and is the affected one; no advisory from the vendor. Source: researcher writeup (hackmd), VulnCheck/CVE record, repo v0.1.10 config. Shipped config still uses a public secret. Not checked: X/HN discussion.

## Documents

- [advisory] VulnCheck advisory CVE-2026-111692 https://www.vulncheck.com/advisories/databuff-ai-apm-web-through-0.1.10-authentication-bypass-via-hardcoded-hmac-secret
- [describes] databuff v0.1.10 application.yml (jwt secret dev-secret) https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/resources/application.yml
- [mentions] databuff releases (latest v0.1.10, no fix) https://github.com/databufflabs/databuff/releases
- [poc] DataBuff pre-auth admin takeover via hardcoded default JWT secret (hieuPenguinnn) https://hackmd.io/@hieuPenguinnn/databuff-default-jwt-secret-auth-bypass

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_