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124 vulnerabilities found for libexpat by libexpat_project
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
|
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
|
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| 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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
|
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-821 - Incorrect Synchronization
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
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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
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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
VLAI
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient entropy
Assigner
References
9 references
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
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CVE-2026-45186 (GCVE-0-2026-45186)
Vulnerability from nvd – Published: 2026-05-10 06:36 – Updated: 2026-05-11 22:23
VLAI
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-821 - Incorrect Synchronization
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
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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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
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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
VLAI
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient entropy
Assigner
References
9 references
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
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CVE-2026-45186 (GCVE-0-2026-45186)
Vulnerability from cvelistv5 – Published: 2026-05-10 06:36 – Updated: 2026-05-11 22:23
VLAI
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
1 product
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| libexpat project | libexpat |
Affected:
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