CVE Explorer

CVE-2026-44429

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.7, the public catalogue UI served at GET / (file internal/api/handlers/v0/ui_index.html) is vulnerable to stored cross-site scripting via the server.websiteUrl field of any published server.json. Server-side validation in internal/validators/validators.go (validateWebsiteURL) only checks that the URL parses, is absolute, and uses the https scheme; it does not reject quote characters.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:97e2cf018f3cd78a4f681b098b049df3fa7684c3ff898ec758d22e50d967b96b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"registry","vendor":"modelcontextprotocol","versions":[{"status":"affected","version":"< 1.7.7"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"tags":["exploit"],"url":"https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-rqv2-m695-f8j4"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/adp/0/references/0

{"name":"https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-rqv2-m695-f8j4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-rqv2-m695-f8j4"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:044ee8192fc6735ec8b64a90cadb16e8e14adfcda6cd65e406e123da0133a648 · sha256:818fccb07779502c… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer