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    128 vulnerabilities by libexpat_project

    CVE-2026-76957 (GCVE-0-2026-76957)

    Vulnerability from nvd – Published: 2026-08-20 04:28 – Updated: 2026-08-20 15:26
    VLAI
    Summary
    libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
    Severity
    4.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 15:05 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.4 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
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    CVE-2026-76956 (GCVE-0-2026-76956)

    Vulnerability from nvd – Published: 2026-08-20 04:22 – Updated: 2026-08-20 17:42
    VLAI
    Summary
    In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 15:05 UTC
    CWE
    • CWE-394 - Unexpected Status Code or Return Value
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 2.8.2 , < 2.8.4 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56412 (GCVE-0-2026-56412)

    Vulnerability from nvd – Published: 2026-06-21 15:58 – Updated: 2026-06-22 16:31
    VLAI
    Summary
    libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
    Severity
    4.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 16:30 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56411 (GCVE-0-2026-56411)

    Vulnerability from nvd – Published: 2026-06-21 15:56 – Updated: 2026-06-22 16:31
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 16:31 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56410 (GCVE-0-2026-56410)

    Vulnerability from nvd – Published: 2026-06-21 15:55 – Updated: 2026-06-22 15:56
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:56 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56409 (GCVE-0-2026-56409)

    Vulnerability from nvd – Published: 2026-06-21 15:52 – Updated: 2026-06-22 15:56
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:56 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56408 (GCVE-0-2026-56408)

    Vulnerability from nvd – Published: 2026-06-21 15:51 – Updated: 2026-06-22 15:55
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in copyString.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:55 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
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    CVE-2026-56407 (GCVE-0-2026-56407)

    Vulnerability from nvd – Published: 2026-06-21 15:49 – Updated: 2026-06-22 15:55
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:54 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56406 (GCVE-0-2026-56406)

    Vulnerability from nvd – Published: 2026-06-21 15:48 – Updated: 2026-06-22 17:02
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:02 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56405 (GCVE-0-2026-56405)

    Vulnerability from nvd – Published: 2026-06-21 15:47 – Updated: 2026-06-22 17:03
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in getAttributeId.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:03 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56404 (GCVE-0-2026-56404)

    Vulnerability from nvd – Published: 2026-06-21 15:45 – Updated: 2026-06-22 17:05
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in addBinding.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:04 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
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        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    To clipboard 

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    CVE-2026-56403 (GCVE-0-2026-56403)

    Vulnerability from nvd – Published: 2026-06-21 15:43 – Updated: 2026-06-22 17:05
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in storeAtts.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:05 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
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        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56132 (GCVE-0-2026-56132)

    Vulnerability from nvd – Published: 2026-06-19 03:00 – Updated: 2026-06-22 14:59
    VLAI
    Summary
    In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 14:59 UTC
    CWE
    • CWE-821 - Incorrect Synchronization
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56131 (GCVE-0-2026-56131)

    Vulnerability from nvd – Published: 2026-06-19 02:56 – Updated: 2026-06-22 14:58
    VLAI
    Summary
    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).
    Severity
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    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 14:58 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-50219 (GCVE-0-2026-50219)

    Vulnerability from nvd – Published: 2026-06-04 04:20 – Updated: 2026-06-04 12:36
    VLAI
    Summary
    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
    Severity
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    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-04 12:36 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
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    CVE-2026-76957 (GCVE-0-2026-76957)

    Vulnerability from cvelistv5 – Published: 2026-08-20 04:28 – Updated: 2026-08-20 15:26
    VLAI
    Summary
    libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
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    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 15:05 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.4 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-76956 (GCVE-0-2026-76956)

    Vulnerability from cvelistv5 – Published: 2026-08-20 04:22 – Updated: 2026-08-20 17:42
    VLAI
    Summary
    In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-20 15:05 UTC
    CWE
    • CWE-394 - Unexpected Status Code or Return Value
    Assigner
    References
    Impacted products
    Vendor Product Version
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        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56412 (GCVE-0-2026-56412)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:58 – Updated: 2026-06-22 16:31
    VLAI
    Summary
    libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
    Severity
    4.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 16:30 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56411 (GCVE-0-2026-56411)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:56 – Updated: 2026-06-22 16:31
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 16:31 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56410 (GCVE-0-2026-56410)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:55 – Updated: 2026-06-22 15:56
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:56 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56409 (GCVE-0-2026-56409)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:52 – Updated: 2026-06-22 15:56
    VLAI
    Summary
    xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
    Severity
    6.5 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:56 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56408 (GCVE-0-2026-56408)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:51 – Updated: 2026-06-22 15:55
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in copyString.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:55 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56407 (GCVE-0-2026-56407)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:49 – Updated: 2026-06-22 15:55
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 15:54 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
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    CVE-2026-56406 (GCVE-0-2026-56406)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:48 – Updated: 2026-06-22 17:02
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:02 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56405 (GCVE-0-2026-56405)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:47 – Updated: 2026-06-22 17:03
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in getAttributeId.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:03 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-56404 (GCVE-0-2026-56404)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:45 – Updated: 2026-06-22 17:05
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in addBinding.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:04 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56403 (GCVE-0-2026-56403)

    Vulnerability from cvelistv5 – Published: 2026-06-21 15:43 – Updated: 2026-06-22 17:05
    VLAI
    Summary
    libexpat before 2.8.2 has an integer overflow in storeAtts.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 17:05 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56132 (GCVE-0-2026-56132)

    Vulnerability from cvelistv5 – Published: 2026-06-19 03:00 – Updated: 2026-06-22 14:59
    VLAI
    Summary
    In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
    Severity
    6.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 14:59 UTC
    CWE
    • CWE-821 - Incorrect Synchronization
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-56131 (GCVE-0-2026-56131)

    Vulnerability from cvelistv5 – Published: 2026-06-19 02:56 – Updated: 2026-06-22 14:58
    VLAI
    Summary
    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).
    Severity
    4.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-22 14:58 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
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    CVE-2026-50219 (GCVE-0-2026-50219)

    Vulnerability from cvelistv5 – Published: 2026-06-04 04:20 – Updated: 2026-06-04 12:36
    VLAI
    Summary
    libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
    Severity
    4.9 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-04 12:36 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
        cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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