Medium · CVSS 6.3CVE-2026-74858

jae-jae fetcher-mcp URL Validation security-credentials fetch_urls server-side request forgery

Answer in brief

CVE-2026-74858 records a Medium severity (CVSS 6.3) vulnerability in jae-jae fetcher-mcp URL Validation security-credentials fetch_urls server-side request forgery. The current sources do not mark it as known exploited. The current feed maps jae-jae/fetcher-mcp (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 17, 2026Updated Aug 20, 2026Source checked Oct 1, 2026First seen by HOL Aug 17, 2026Material review Aug 20, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.3. 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 jae-jae/fetcher-mcp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
jae-jae/fetcher-mcpgeneric	0.3.0 \|\| 0.3.1 \|\| 0.3.2 \|\| 0.3.3 \|\| 0.3.4 \|\| 0.3.5 \|\| 0.3.6 \|\| 0.3.7 \|\| 0.3.8 \|\| 0.3.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for jae-jae/fetcher-mcp.
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 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 17, 2026

Sources and claim methodology

Upstream source description

A vulnerability has been found in jae-jae fetcher-mcp up to 0.3.9. Impacted is the function fetch_url/fetch_urls of the file /latest/meta-data/iam/security-credentials/ of the component URL Validation. Such manipulation leads to server-side request forgery. It is possible to launch the attack remotely. The project was informed of the problem early through an issue report but has not responded yet.

Quoted source text, attributed separately from HOL analysis.