Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111692DataBuff ai-apm-web through 0.1.10 Authentication Bypass via Hardcoded HMAC Secret

Critical 9.8

In plain English

A critical-severity security flaw in databuff from databufflabs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.6%top 50.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
databufflabs	databuff	0 – through 0.1.10

Weakness: CWE-321 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://hackmd.io/@hieuPenguinnn/databuff-default-jwt-secret-auth-bypass third-party-advisory
https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/resources/application.yml#L54-L59 technical-description
https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/config/JwtProperties.java#L8-L15 technical-description
https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/auth/JwtTokenService.java#L36-L60 technical-description
https://github.com/databufflabs/databuff product
VulnCheck Advisory: DataBuff ai-apm-web through 0.1.10 Authentication Bypass via Hardcoded HMAC Secret third-party-advisory