SSRF in Jae-Jae Fetcher-Mcp
CVE-2026-74858
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Jae-Jae Fetcher-Mcp — versions 0.3.0, 0.3.1, 0.3.2
Weakness classification (CWE)
References
- vuldb.com/vuln/391221 (technical-description, vdb-entry)
- vuldb.com/vuln/391221/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-74858 (third-party-advisory)
- vuldb.com/submit/876015 (third-party-advisory)
- github.com/jae-jae/fetcher-mcp/issues/37 (issue-tracking, broken-link)
- github.com/jae-jae/fetcher-mcp/ (product)
Frequently asked questions
- What is CVE-2026-74858?
- CVE-2026-74858 is a medium-severity vulnerability in Jae-Jae Fetcher-Mcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2026-08-17.
- How severe is CVE-2026-74858?
- Medium severity. CVSS v3 base score is 6.3 out of 10.