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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1278

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1263

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1252

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1259

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/commit/16e2e…

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1262

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1255

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1251

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1249

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1232

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-821 - Incorrect Synchronization

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1272

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1267

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1246

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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To clipboard

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CVE-2026-7210 (GCVE-0-2026-7210)

Vulnerability from nvd – Published: 2026-05-11 17:19 – Updated: 2026-06-10 18:57

Title

The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection

Summary

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-331 - Insufficient entropy

Assigner

PSF

References

9 references

URL	Tags
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/pull/149023	patch
https://github.com/python/cpython/issues/149018	issue-tracking
https://github.com/python/cpython/commit/24b8f125…	patch
https://github.com/python/cpython/commit/3573b3b1…	patch
https://github.com/python/cpython/commit/eeea765c…	patch
https://github.com/python/cpython/commit/fc9b11ff…	patch
http://www.openwall.com/lists/oss-security/2026/05/11/8
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Python Software Foundation	CPython	Affected: 0 , < 3.13.14 (python) Affected: 3.14.0 , < 3.14.6 (python) Affected: 3.15.0a1 , < 3.15.0b2 (python)

Credits

Stan Ulbrych (https://github.com/StanFromIreland) Gregory P. Smith (https://github.com/gpshead)

Show details on NVD website

JSON

To clipboard

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CVE-2026-45186 (GCVE-0-2026-45186)

Vulnerability from nvd – Published: 2026-05-10 06:36 – Updated: 2026-06-30 03:17

Summary

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

Severity

2.9 (Low)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

mitre

References

11 references

URL	Tags
https://github.com/libexpat/libexpat/pull/1216
http://www.openwall.com/lists/oss-security/2026/0…
https://access.redhat.com/security/cve/CVE-2026-45186	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2468575	issue-trackingx_refsource_REDHAT
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https://access.redhat.com/errata/RHSA-2026:23230	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22721	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29197	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:27201	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26319	vendor-advisoryx_refsource_REDHAT

Impacted products

12 products

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.1 (semver)
Red Hat	Red Hat Enterprise Linux AppStream (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux AppStream (v. 9)	cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat Enterprise Linux BaseOS (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux BaseOS (v. 8)	cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux BaseOS (v. 9)	cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat Discovery 2	cpe:/a:redhat:discovery:2::el9
Red Hat	Red Hat JBoss Core Services 2.4.62.SP4	cpe:/a:redhat:jboss_core_services:1
Red Hat	Red Hat Update Infrastructure 5	cpe:/a:redhat:rhui:5::el9
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1278

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1263

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1252

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1259

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/commit/16e2e…

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1262

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1255

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1251

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1249

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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To clipboard

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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

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 (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1232

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-821 - Incorrect Synchronization

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1272

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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To clipboard

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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1267

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

JSON

To clipboard

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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

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/libexpat/libexpat/pull/1246

Impacted products

1 product

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.2 (semver)

Show details on NVD website

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CVE-2026-7210 (GCVE-0-2026-7210)

Vulnerability from cvelistv5 – Published: 2026-05-11 17:19 – Updated: 2026-06-10 18:57

Title

The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection

Summary

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-331 - Insufficient entropy

Assigner

PSF

References

9 references

URL	Tags
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/pull/149023	patch
https://github.com/python/cpython/issues/149018	issue-tracking
https://github.com/python/cpython/commit/24b8f125…	patch
https://github.com/python/cpython/commit/3573b3b1…	patch
https://github.com/python/cpython/commit/eeea765c…	patch
https://github.com/python/cpython/commit/fc9b11ff…	patch
http://www.openwall.com/lists/oss-security/2026/05/11/8
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Python Software Foundation	CPython	Affected: 0 , < 3.13.14 (python) Affected: 3.14.0 , < 3.14.6 (python) Affected: 3.15.0a1 , < 3.15.0b2 (python)

Credits

Stan Ulbrych (https://github.com/StanFromIreland) Gregory P. Smith (https://github.com/gpshead)

Show details on NVD website

JSON

To clipboard

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CVE-2026-45186 (GCVE-0-2026-45186)

Vulnerability from cvelistv5 – Published: 2026-05-10 06:36 – Updated: 2026-06-30 03:17

Summary

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

Severity

2.9 (Low)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

mitre

References

11 references

URL	Tags
https://github.com/libexpat/libexpat/pull/1216
http://www.openwall.com/lists/oss-security/2026/0…
https://access.redhat.com/security/cve/CVE-2026-45186	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2468575	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:22715	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23230	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22721	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29197	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:27201	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26319	vendor-advisoryx_refsource_REDHAT

Impacted products

12 products

Vendor	Product	Version
libexpat project	libexpat	Affected: 0 , < 2.8.1 (semver)
Red Hat	Red Hat Enterprise Linux AppStream (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux AppStream (v. 9)	cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat Enterprise Linux BaseOS (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux BaseOS (v. 8)	cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux BaseOS (v. 9)	cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat	Red Hat Discovery 2	cpe:/a:redhat:discovery:2::el9
Red Hat	Red Hat JBoss Core Services 2.4.62.SP4	cpe:/a:redhat:jboss_core_services:1
Red Hat	Red Hat Update Infrastructure 5	cpe:/a:redhat:rhui:5::el9
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria

124 vulnerabilities found for libexpat by libexpat_project

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

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

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

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

CVE-2026-56408 (GCVE-0-2026-56408)

CVE-2026-56407 (GCVE-0-2026-56407)

CVE-2026-56406 (GCVE-0-2026-56406)

CVE-2026-56405 (GCVE-0-2026-56405)

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

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

CVE-2026-56132 (GCVE-0-2026-56132)

CVE-2026-56131 (GCVE-0-2026-56131)

CVE-2026-50219 (GCVE-0-2026-50219)

CVE-2026-7210 (GCVE-0-2026-7210)

CVE-2026-45186 (GCVE-0-2026-45186)

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

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

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

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

CVE-2026-56408 (GCVE-0-2026-56408)

CVE-2026-56407 (GCVE-0-2026-56407)

CVE-2026-56406 (GCVE-0-2026-56406)

CVE-2026-56405 (GCVE-0-2026-56405)

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

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

CVE-2026-56132 (GCVE-0-2026-56132)

CVE-2026-56131 (GCVE-0-2026-56131)

CVE-2026-50219 (GCVE-0-2026-50219)

CVE-2026-7210 (GCVE-0-2026-7210)

CVE-2026-45186 (GCVE-0-2026-45186)