Expat Out-of-Bounds Read via dtdCopy
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| libexpat | libexpat | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
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| Libexpat | Expat |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.353% probability within 30 days)
| Type | Values Removed | Values Added |
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| First Time appeared |
Libexpat Project
Libexpat Project libexpat |
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| CPEs | cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Libexpat Project
Libexpat Project libexpat |
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| First Time appeared |
Libexpat
Libexpat expat |
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| Vendors & Products |
Libexpat
Libexpat expat |
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| Metrics |
ssvc
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| Description | Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046. | |
| Title | Expat Out-of-Bounds Read via dtdCopy | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV3_1
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