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CVE-2026-14540VulnerabilityPublished Updated

mcp-toolbox · A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google

Affects mcp-toolboxSource GCVE Database

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Authoritative record:CVE-2026-14540· High 8.0

Not known to be exploited · CVSS 8.0 High.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 4.0 base score
8.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubgoogleapis/mcp-toolboxpkg:github/googleapis/mcp-toolboxOther threatsAffected
  • >=0.3.0 <=1.4.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, avoid exposing the vulnerable components to untrusted inputs or untrusted networks where possible.

Description

A Server-Side Request Forgery (SSRF) vulnerability exists in Google mcp-toolbox versions 0.3.0 through 1.4.0. The vulnerability arises because the HTTP client used by the toolbox does not enforce restrictive redirect policies or validate target IPs, allowing crafted requests to cause unauthorized internal or external requests. This can lead to information disclosure or unauthorized interactions with internal systems. The vulnerability has a CVSS score of 6.1, indicating a high severity level.

References

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