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    4 vulnerabilities found for py-libp2p by libp2p

    CVE-2026-73568 (GCVE-0-2026-73568)

    Vulnerability from nvd – Published: 2026-08-13 17:43 – Updated: 2026-08-13 18:06
    VLAI
    Title
    py-libp2p: yamux connection DoS via oversized data frame
    Summary
    py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handle_incoming() method in libp2p/stream_muxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with read_exactly() before validating it against MAX_WINDOW_SIZE or checking whether stream_id exists. A peer that completes the standard Noise handshake can send a 12-byte frame declaring a 0xFFFFFFFF body and then withhold the body, causing the sequential yamux read loop used by the default new_host() configuration to block and preventing every stream on that connection from making progress. No fixed version is available as of this review.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-13 18:06 UTC
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    libp2p py-libp2p Affected: <= 0.7.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2025-29606 (GCVE-0-2025-29606)

    Vulnerability from nvd – Published: 2025-07-14 00:00 – Updated: 2025-07-14 14:13
    VLAI
    Summary
    py-libp2p before 0.2.3 allows a peer to cause a denial of service (resource consumption) via a large RSA key.
    Severity
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-07-14 14:12 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    libp2p py-libp2p Affected: 0 , < 0.2.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-73568 (GCVE-0-2026-73568)

    Vulnerability from cvelistv5 – Published: 2026-08-13 17:43 – Updated: 2026-08-13 18:06
    VLAI
    Title
    py-libp2p: yamux connection DoS via oversized data frame
    Summary
    py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handle_incoming() method in libp2p/stream_muxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with read_exactly() before validating it against MAX_WINDOW_SIZE or checking whether stream_id exists. A peer that completes the standard Noise handshake can send a 12-byte frame declaring a 0xFFFFFFFF body and then withhold the body, causing the sequential yamux read loop used by the default new_host() configuration to block and preventing every stream on that connection from making progress. No fixed version is available as of this review.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-13 18:06 UTC
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    libp2p py-libp2p Affected: <= 0.7.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2025-29606 (GCVE-0-2025-29606)

    Vulnerability from cvelistv5 – Published: 2025-07-14 00:00 – Updated: 2025-07-14 14:13
    VLAI
    Summary
    py-libp2p before 0.2.3 allows a peer to cause a denial of service (resource consumption) via a large RSA key.
    Severity
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-07-14 14:12 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    libp2p py-libp2p Affected: 0 , < 0.2.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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