High
Security advisory
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-9233
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:51 UTC · Revision 1
Source evidence
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
osv:CVE-2017-9233
Complete source record
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"modified": "2026-10-24T10:50:30.424269907Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
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"https://github.com/libexpat/libexpat/blob/master/expat/Changes",
"https://support.apple.com/HT208112",
"https://support.apple.com/HT208113",
"https://support.apple.com/HT208115",
"https://support.apple.com/HT208144",
"https://support.f5.com/csp/article/K03244804",
"https://libexpat.github.io/doc/cve-2017-9233/"
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}