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94 vulnerabilities found for libexpat by libexpat_project
CVE-2026-41080 (GCVE-0-2026-41080)
Vulnerability from nvd – Published: 2026-04-16 16:52 – Updated: 2026-04-18 02:33
VLAI?
Summary
libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Severity ?
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.6
(semver)
|
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CVE-2026-32778 (GCVE-0-2026-32778)
Vulnerability from nvd – Published: 2026-03-16 07:02 – Updated: 2026-03-17 14:39
VLAI?
Summary
libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
|
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CVE-2026-32777 (GCVE-0-2026-32777)
Vulnerability from nvd – Published: 2026-03-16 06:58 – Updated: 2026-03-16 14:55
VLAI?
Summary
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
Severity ?
4 (Medium)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
|
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CVE-2026-32776 (GCVE-0-2026-32776)
Vulnerability from nvd – Published: 2026-03-16 06:54 – Updated: 2026-03-16 14:58
VLAI?
Summary
libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.
Severity ?
4 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
|
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CVE-2026-25210 (GCVE-0-2026-25210)
Vulnerability from nvd – Published: 2026-01-30 06:40 – Updated: 2026-02-03 16:42
VLAI?
Summary
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.
Severity ?
6.9 (Medium)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.4
(semver)
|
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CVE-2026-24515 (GCVE-0-2026-24515)
Vulnerability from nvd – Published: 2026-01-23 07:46 – Updated: 2026-01-23 15:31
VLAI?
Summary
In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.4
(semver)
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CVE-2025-66382 (GCVE-0-2025-66382)
Vulnerability from nvd – Published: 2025-11-28 00:00 – Updated: 2026-04-09 18:00
VLAI?
Summary
In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.
Severity ?
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , ≤ 2.7.5
(semver)
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CVE-2025-59375 (GCVE-0-2025-59375)
Vulnerability from nvd – Published: 2025-09-15 00:00 – Updated: 2025-11-04 21:13
VLAI?
Summary
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Severity ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.2
(semver)
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CVE-2024-50602 (GCVE-0-2024-50602)
Vulnerability from nvd – Published: 2024-10-27 00:00 – Updated: 2025-04-30 20:03
VLAI?
Summary
An issue was discovered in libexpat before 2.6.4. There is a crash within the XML_ResumeParser function because XML_StopParser can stop/suspend an unstarted parser.
Severity ?
5.9 (Medium)
CWE
- n/a
Assigner
References
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CVE-2024-45492 (GCVE-0-2024-45492)
Vulnerability from nvd – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. nextScaffoldPart in xmlparse.c can have an integer overflow for m_groupSize on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
Severity ?
7.3 (High)
CWE
- n/a
Assigner
References
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CVE-2024-45491 (GCVE-0-2024-45491)
Vulnerability from nvd – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
Severity ?
7.3 (High)
CWE
- n/a
Assigner
References
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CVE-2024-45490 (GCVE-0-2024-45490)
Vulnerability from nvd – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.
Severity ?
9.8 (Critical)
CWE
- n/a
Assigner
References
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CVE-2024-28757 (GCVE-0-2024-28757)
Vulnerability from nvd – Published: 2024-03-10 00:00 – Updated: 2025-11-04 22:06
VLAI?
Summary
libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2023-52426 (GCVE-0-2023-52426)
Vulnerability from nvd – Published: 2024-02-04 00:00 – Updated: 2025-11-04 18:21
VLAI?
Summary
libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.
Severity ?
5.5 (Medium)
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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CVE-2023-52425 (GCVE-0-2023-52425)
Vulnerability from nvd – Published: 2024-02-04 00:00 – Updated: 2025-11-04 18:21
VLAI?
Summary
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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CVE-2026-41080 (GCVE-0-2026-41080)
Vulnerability from cvelistv5 – Published: 2026-04-16 16:52 – Updated: 2026-04-18 02:33
VLAI?
Summary
libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Severity ?
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.6
(semver)
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CVE-2026-32778 (GCVE-0-2026-32778)
Vulnerability from cvelistv5 – Published: 2026-03-16 07:02 – Updated: 2026-03-17 14:39
VLAI?
Summary
libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
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CVE-2026-32777 (GCVE-0-2026-32777)
Vulnerability from cvelistv5 – Published: 2026-03-16 06:58 – Updated: 2026-03-16 14:55
VLAI?
Summary
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
Severity ?
4 (Medium)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
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CVE-2026-32776 (GCVE-0-2026-32776)
Vulnerability from cvelistv5 – Published: 2026-03-16 06:54 – Updated: 2026-03-16 14:58
VLAI?
Summary
libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.
Severity ?
4 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.5
(semver)
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CVE-2026-25210 (GCVE-0-2026-25210)
Vulnerability from cvelistv5 – Published: 2026-01-30 06:40 – Updated: 2026-02-03 16:42
VLAI?
Summary
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.
Severity ?
6.9 (Medium)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.4
(semver)
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CVE-2026-24515 (GCVE-0-2026-24515)
Vulnerability from cvelistv5 – Published: 2026-01-23 07:46 – Updated: 2026-01-23 15:31
VLAI?
Summary
In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.4
(semver)
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CVE-2025-66382 (GCVE-0-2025-66382)
Vulnerability from cvelistv5 – Published: 2025-11-28 00:00 – Updated: 2026-04-09 18:00
VLAI?
Summary
In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.
Severity ?
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , ≤ 2.7.5
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CVE-2025-59375 (GCVE-0-2025-59375)
Vulnerability from cvelistv5 – Published: 2025-09-15 00:00 – Updated: 2025-11-04 21:13
VLAI?
Summary
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Severity ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.7.2
(semver)
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CVE-2024-50602 (GCVE-0-2024-50602)
Vulnerability from cvelistv5 – Published: 2024-10-27 00:00 – Updated: 2025-04-30 20:03
VLAI?
Summary
An issue was discovered in libexpat before 2.6.4. There is a crash within the XML_ResumeParser function because XML_StopParser can stop/suspend an unstarted parser.
Severity ?
5.9 (Medium)
CWE
- n/a
Assigner
References
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CVE-2024-45491 (GCVE-0-2024-45491)
Vulnerability from cvelistv5 – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
Severity ?
7.3 (High)
CWE
- n/a
Assigner
References
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CVE-2024-45490 (GCVE-0-2024-45490)
Vulnerability from cvelistv5 – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.
Severity ?
9.8 (Critical)
CWE
- n/a
Assigner
References
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"url": "http://seclists.org/fulldisclosure/2024/Dec/6"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html"
}
],
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CVE-2024-45492 (GCVE-0-2024-45492)
Vulnerability from cvelistv5 – Published: 2024-08-30 00:00 – Updated: 2025-11-04 16:15
VLAI?
Summary
An issue was discovered in libexpat before 2.6.3. nextScaffoldPart in xmlparse.c can have an integer overflow for m_groupSize on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
Severity ?
7.3 (High)
CWE
- n/a
Assigner
References
{
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CVE-2024-28757 (GCVE-0-2024-28757)
Vulnerability from cvelistv5 – Published: 2024-03-10 00:00 – Updated: 2025-11-04 22:06
VLAI?
Summary
libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
{
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPLC6WDSRDUYS7F7JWAOVOHFNOUQ43DD/"
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},
{
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"x_transferred"
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},
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},
{
"name": "[oss-security] 20240315 Expat 2.6.2 released, includes security fixes",
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"mailing-list",
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"url": "http://www.openwall.com/lists/oss-security/2024/03/15/1"
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},
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},
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},
{
"name": "[oss-security] 20240315 Expat 2.6.2 released, includes security fixes",
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CVE-2023-52426 (GCVE-0-2023-52426)
Vulnerability from cvelistv5 – Published: 2024-02-04 00:00 – Updated: 2025-11-04 18:21
VLAI?
Summary
libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.
Severity ?
5.5 (Medium)
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
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"adp": [
{
"metrics": [
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"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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"options": [
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},
{
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],
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"timestamp": "2024-06-26T15:54:28.451554Z",
"version": "2.0.3"
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"url": "https://cwe.mitre.org/data/definitions/776.html"
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},
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CVE-2023-52425 (GCVE-0-2023-52425)
Vulnerability from cvelistv5 – Published: 2024-02-04 00:00 – Updated: 2025-11-04 18:21
VLAI?
Summary
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
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},
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"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html"
},
{
"name": "[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)",
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},
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}
],
"title": "CVE Program Container"
},
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-52425",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-08-26T19:20:56.852251Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
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}
]
}
],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed."
}
],
"problemTypes": [
{
"descriptions": [
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"description": "n/a",
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"type": "text"
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],
"providerMetadata": {
"dateUpdated": "2024-06-14T13:06:11.482Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/libexpat/libexpat/pull/789"
},
{
"name": "FEDORA-2024-fbe1f0c1aa",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/"
},
{
"name": "FEDORA-2024-b8656bc059",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/"
},
{
"name": "[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html"
},
{
"name": "[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2024/03/20/5"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240614-0003/"
}
]
}
},
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"datePublished": "2024-02-04T00:00:00.000Z",
"dateReserved": "2024-02-04T00:00:00.000Z",
"dateUpdated": "2025-11-04T18:21:45.774Z",
"state": "PUBLISHED"
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}