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    4 vulnerabilities by hyper-mcp-rs

    CVE-2026-108699 (GCVE-0-2026-108699)

    Vulnerability from nvd – Published: 2026-10-11 13:25 – Updated: 2026-10-13 19:35
    VLAI
    Title
    hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
    Summary
    hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accepts any signer identity and OIDC issuer by default. Attackers controlling a plugin image reference can sign a malicious image with a free Sigstore keyless certificate to execute plugins with configured host, filesystem, and environment capabilities.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-13 19:35 UTC
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6059 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    hyper-mcp-rs hyper-mcp Affected: 0 , ≤ 0.8.3 (semver)
    		Create a notification for this product.
    Date Public
    2026-10-11 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

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    CVE-2026-108698 (GCVE-0-2026-108698)

    Vulnerability from nvd – Published: 2026-10-11 13:25 – Updated: 2026-10-13 16:59
    VLAI
    Title
    hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition
    Summary
    hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-13 15:49 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6059 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    hyper-mcp-rs hyper-mcp Affected: 0 , ≤ 0.8.3 (semver)
    		Create a notification for this product.
    Date Public
    2026-10-11 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

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    CVE-2026-108699 (GCVE-0-2026-108699)

    Vulnerability from cvelistv5 – Published: 2026-10-11 13:25 – Updated: 2026-10-13 19:35
    VLAI
    Title
    hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
    Summary
    hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accepts any signer identity and OIDC issuer by default. Attackers controlling a plugin image reference can sign a malicious image with a free Sigstore keyless certificate to execute plugins with configured host, filesystem, and environment capabilities.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-13 19:35 UTC
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6059 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    hyper-mcp-rs hyper-mcp Affected: 0 , ≤ 0.8.3 (semver)
    		Create a notification for this product.
    Date Public
    2026-10-11 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

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    CVE-2026-108698 (GCVE-0-2026-108698)

    Vulnerability from cvelistv5 – Published: 2026-10-11 13:25 – Updated: 2026-10-13 16:59
    VLAI
    Title
    hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition
    Summary
    hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities.
    Severity
    8.3 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
    6.5 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-13 15:49 UTC
    CWE
    • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 6059 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    hyper-mcp-rs hyper-mcp Affected: 0 , ≤ 0.8.3 (semver)
    		Create a notification for this product.
    Date Public
    2026-10-11 00:00
    Credits
    hieuPenguinnn
    Show details on NVD website
    To clipboard 

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