CVE-2026-108583: SSRF (CVSS 4.2)

Description

zotero-mcp 0.10.0 through 0.14.1 contains a server-side request forgery vulnerability that allows attackers to reach internal services because _fetch_embedded_metadata fetches URLs without destination validation. Attackers can steer the agent via prompt injection into calling zotero_add_by_url, causing requests to loopback, private, or link-local hosts directly or via redirects, leaking citation meta-tags and error details.

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CVSS v3.1 Score

4.2

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

References

Other References

https://github.com/54yyyu/zotero-mcp/blob/v0.14.1/src/zotero_mcp/tools/write.py#L2035-L2089 https://github.com/54yyyu/zotero-mcp/issues/326 https://hackmd.io/@haind/zotero-mcp-generic-url-metadata-ssrf https://www.vulncheck.com/advisories/zotero-mcp-0.10.0-through-0.14.1-ssrf-via-zotero-add-by-url-tool https://hackmd.io/@haind/zotero-mcp-generic-url-metadata-ssrf

Frequently Asked Questions

What is CVE-2026-108583? +

zotero-mcp 0.10.0 through 0.14.1 contains a server-side request forgery vulnerability that allows attackers to reach internal services because _fetch_embedded_metadata fetches URLs without destination validation. Attackers can steer the agent via prompt injection into calling zotero_add_by_url, causing requests to loopback, private, or link-local hosts directly or via redirects, leaking citation meta-tags and error details. It has a CVSS v3.1 base score of 4.2 (MEDIUM).

How severe is CVE-2026-108583? +

CVE-2026-108583 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-108583? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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