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    4 vulnerabilities by PyPy

    CVE-2026-76875 (GCVE-0-2026-76875)

    Vulnerability from nvd – Published: 2026-09-29 12:45 – Updated: 2026-10-02 12:07 X_Open Source
    VLAI
    Title
    PyPy pyexpat ExternalEntityParserCreate Use-After-Free
    Summary
    PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-02 12:07 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    PyPy PyPy Affected: 0 , < 3.11.16 (semver)
    Affected: 3.12.0 , < 3.12.14 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-19 00:00
    Credits
    Fabian Wahle (Hap Security) VulnCheck
    Show details on NVD website
    To clipboard 

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    CVE-2022-37454 (GCVE-0-2022-37454)

    Vulnerability from nvd – Published: 2022-10-21 00:00 – Updated: 2025-05-08 15:03
    VLAI
    Summary
    The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and resultant buffer overflow that allows attackers to execute arbitrary code or eliminate expected cryptographic properties. This occurs in the sponge function interface.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-05-08 15:03 UTC
    CWE
    • n/a
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Show details on NVD website
    To clipboard 

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    CVE-2026-76875 (GCVE-0-2026-76875)

    Vulnerability from cvelistv5 – Published: 2026-09-29 12:45 – Updated: 2026-10-02 12:07 X_Open Source
    VLAI
    Title
    PyPy pyexpat ExternalEntityParserCreate Use-After-Free
    Summary
    PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-02 12:07 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    PyPy PyPy Affected: 0 , < 3.11.16 (semver)
    Affected: 3.12.0 , < 3.12.14 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-19 00:00
    Credits
    Fabian Wahle (Hap Security) VulnCheck
    Show details on NVD website
    To clipboard 

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    CVE-2022-37454 (GCVE-0-2022-37454)

    Vulnerability from cvelistv5 – Published: 2022-10-21 00:00 – Updated: 2025-05-08 15:03
    VLAI
    Summary
    The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and resultant buffer overflow that allows attackers to execute arbitrary code or eliminate expected cryptographic properties. This occurs in the sponge function interface.
    Severity
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-05-08 15:03 UTC
    CWE
    • n/a
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Show details on NVD website
    To clipboard 

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