Timescale pg-aiguide through 0.5.0 DNS Rebinding via Disabled Host Header Allow-List (CVE-2026-81095) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-81095

Timescale pg-aiguide through 0.5.0 DNS Rebinding via Disabled Host Header Allow-List

Answer in brief

CVE-2026-81095 records a Unknown severity vulnerability in Timescale pg-aiguide through 0.5.0 DNS Rebinding via Disabled Host Header Allow-List. The current sources do not mark it as known exploited. The current feed maps timescale/pg-aiguide (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Aug 27, 2026Source checked Aug 27, 2026First seen by HOL Aug 27, 2026Material review Aug 27, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps timescale/pg-aiguide (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
timescale/pg-aiguidegeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for timescale/pg-aiguide.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 27, 2026

Sources and claim methodology

Upstream source description

pg-aiguide started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted a request whatever host it named. A page in a browser could therefore point a name it controlled at the address the server was bound to and drive the locally reachable MCP server through the visitor's browser. The protection was already available in the packaged transport and simply not turned on, so updating the dependency alone would not have closed it. Version 0.5.1 passes the option explicitly.

Quoted source text, attributed separately from HOL analysis.