CVE-2026-104120 (GCVE-0-2026-104120)
Vulnerability from cvelistv5 – Published: 2026-10-02 02:15 – Updated: 2026-10-06 02:27
VLAI
EPSS
VEX
Title
modelcontextprotocol mcp-server-fetch/mcp-server-everything Fetch Tool server.py fetch_url server-side request forgery
Summary
A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetch_url of the file mcp_server_fetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request forgery. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 02:27 UTC
CWE
- CWE-918 - Server-Side Request Forgery
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/412764 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/412764/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-104120 | third-party-advisory |
| https://vuldb.com/submit/960099 | third-party-advisory |
| https://github.com/modelcontextprotocol/servers/i… | exploitissue-tracking |
| https://github.com/modelcontextprotocol/servers/p… | issue-trackingpatch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| modelcontextprotocol | mcp-server-fetch |
Affected:
2026.6.0
Affected: 2026.6.1 Affected: 2026.6.2 Affected: 2026.6.3 Affected: 2026.6.4 cpe:2.3:a:modelcontextprotocol:mcp-server-fetch:*:*:*:*:*:*:*:* |
||
| modelcontextprotocol | mcp-server-everything |
Affected:
2026.6.0
Affected: 2026.6.1 Affected: 2026.6.2 Affected: 2026.6.3 Affected: 2026.6.4 cpe:2.3:a:modelcontextprotocol:mcp-server-everything:*:*:*:*:*:*:*:* |
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.