Authentication bypass in DataBuff ai-apm-web via hardcoded HMAC secret
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.
Summary
DataBuff ai-apm-web through 0.1.10 uses a hardcoded HMAC secret in JwtTokenService, which lets unauthenticated remote attackers forge admin session tokens. A CWE-321 hard-coded cryptographic key enables this, and the forged tokens grant full administrative access to protected /webapi routes, including the Doris SQL query API. Exploitation requires no privileges or user interaction, and CISA SSVC rates exploitation as poc.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| databufflabs | databuff | up to 0.1.10 | — | No fix listed | CNA |
- databuff Vendordatabufflabs Affected up to 0.1.10 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for DataBuff ai-apm-web.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111692
- 2026-10-16 Alias added: GHSA-8xhf-8q7j-9q7q
- 2026-10-18 CISA SSVC decision points changed
- 2026-10-18 Priority changed: MEDIUM → HIGH
References
Other 4
- https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/resources/application.yml#L54-L59
- https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/config/JwtProperties.java#L8-L15
- https://github.com/databufflabs/databuff/blob/v0.1.10/ai-apm-web/src/main/java/com/databuff/apm/web/auth/JwtTokenService.java#L36-L60
- https://github.com/databufflabs/databuff
More databufflabs vulnerabilities
- TI-2026-75479 DataBuff ai-apm-web ships hard-coded default admin credentials CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-111692 · CVE Program
- CVE-2026-111692 · NVD
- FIRST EPSS
- GHSA-8xhf-8q7j-9q7q · GitHub Advisory Database · CC BY 4.0
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